Desmond Guilfoyle

Verified list of Omega Constellation calibres with case/reference numbers 352 /354 1952 CK 2648 Also some 352RG Earliest Constellation and Globemaster Stainless steel and other metals 352 /354 1952 CK 2652 Range of domed dials Stainless steel and other metals 352 /354 1952 OT 2648 Range of domed dials 18K solid gold 352 /354 1954 KO 2782 Range of domed dials Gold-cap on stainless steel 352 /354 1954 OT 2782 Range of domed dials 18K solid gold 354 1952 OT 2737 Also some 352RG Guilloche dial 18k screwback case 354 1952 2699 SC Deluxe Dial. First Pie pan in screw in case Screw-in case range of metals 354 1952 OT 2700 De Luxe. First pie pan in press-in case 18K solid gold 354 1954 OT 14355 Grand Luxe 18K solid gold 354 1954 OT 2799 (repl. 2699/ 2700) De Luxe 18K solid gold 501 /505 1956 CK 2852 Range of dials Stainless steel 501 /505 1956 KO 2852 Range of dials Gold-cap on stainless steel 501/505 1956 OT 2852 Deluxe dial 18 Solid Gold (also in white gold) 501 /505 1956 OT 2853 De Luxe 18K solid gold 501/505 1956 2887 Domed dial. Screw-in case version of 2852 Range of metals 504 1957 OT 2954 Calendar de Luxe 18K solid gold 504 1957 CK 2943 Calendar Stainless steel 504 1957 KO 2943 Calendar Gold cap on stainless steel 504 1957 OJ 2943 Calendar 14k solid gold 504 1958 OT 16995 Calendar Grand Luxe 18K solid gold and integ bracelet 504 1958 OT 18747 Calendar Grad Luxe Special 18k solid gold 504 1958 OT 2988 Calendar Grand Luxe 18K solid gold 505 1957 OG 2930 Grand Luxe Solid white gold 505 1957 OT 2930 Grand Luxe Solid yellow gold 551 1959 CK 14381 Lyre-shaped lugs Stainless steel 551 1959 KO 14381 Lyre-shaped lugs Gold cap on stainless steel 551 1959 OJ 14381 Lyre-shaped lugs 14k solid gold 551 1959 OT 14381 Lyre-shaped lugs 18k solid gold 551 1960 CK 14900 [Not specified] Dog Leg lugs Stainless steel 551 1960 KO 14900 Dog Leg lugs Gold-cap on stainless steel 551 1960 OT 14900 Dog Leg lugs 18k solid gold 551 1962 BA/BD 167.005 Dog Leg lugs Both 18k yellow and pink gold 551 1962 CD/CE 167.005 Dog Leg lugs Both yellow and pink gold cap Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 1

551 1962 ST 167.005 Dog Leg lugs Stainless steel 551 1963 CK 14766 Lyre shaped lugs Stainless steel 551 1967 CK/BA 167.005 Monocoque with flat dial All metals - uncommon 551 1967 CK/BA 167.025 Monocoque pie pan All metals - uncommon 561 1959 OT16963 Calendar Grand Luxe 18k solid gold 561 1960 KO 14902 Calendar Gold-cap on stainless steel 561 1960 CK 14902 Calendar Stainless steel 561 1960 OJ/OT 14902 Calendar Both 14k and 18k Solid gold 561 1960 OJ/OT 14393 Calendar 14k and18k solid gold 561 1960 KO/CK 14393 Calendar Gold cap and also stainless steel 561 1960 OT 18782 Calendar Grand Luxe Special 18K solid gold 561 1961 OT 14394 De Luxe 18K solid gold 561 1961 OT 14398 Grand Luxe 18k solid gold 561 1962 BA 168.006 Calendar Deluxe Solid yellow gold 561 1962 BB 168.006 Calendar Deluxe Solid pink gold 561 1962 BA/BB 168.014 Calendar De Luxe Both in solid yellow/solid pink gold 561 1962 CD/ST 168.001 Asian Market 37mm case Stainless steel 561 1963 BA 368.802 Grand Luxe 34mm round Solid yellow gold 561 /564 1962 BA 168.0010 Replacement for 168.004 Solid yellow gold 561 /564 1962 CD/ST 168.0010 Replacement for 168.004 Both goldcap and Stainless Steel 561 /564 1962 BA 168.005 Calendar Solid yellow gold 561 /564 1962 CD/ST 168.005 Calendar Both goldcap and Stainless Steel 561 /564 1962 BA 368.800 Calendar Grand Luxe Solid yellow gold 561 /564 1962 BB 368.800 Calendar Grand Luxe Solid pink gold 561 /564 1962 BA 168.0010 replaced 168.004 Solid 18k gold 561 /564 1962 CD 168.0010 replaced 168.004 Gold-cap on stainless steel 561 /564 1962 168.005 Calendar Full range of metal cases 561 /564 1962 ST 168.0010 [Not specified] Stainless steel 561 /564 1965 BA/BB 168.011 [Not specified] Both solid yellow and pink gold 561 /564 1967 ST 168.009 =168.017 "C" Various metal cases 561/ 564 1962 ST 168.004 Calendar Stainless steel 561/564 1966 168.009 =168.017 "C" Full range of metal cases 564 1966 BA 168.036 Calendar Dlxe: repl by 168.015 18 Solid gold 564 1966 168.015 Monocoque Full range of metal cases Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 2

564 1966 ST 168.027 "C" with knurled bezel Full range of metal cases 564 1967 BA 168.018 Replacement for 168.0010 18k solid gold 564 1967 168.015 Monocoque case with flat dial Range of metals 564 1967 168.025 Monocoque case with pie pan dial Range of metal cases 564 1967 ST 168.0017 "C" Stainless steel and other metals 564 1971 ST 168.039 "C" Stainless steel and other metals 663 1975 755.0802/555.0012 Square, integrated SS & inlaid 18k 672 1969 BA 767.0803 Solid yellow gold 681 1970 BA 768.0803 Gents round case Solid yellow gold 682 1966 ST 568.001 "C" Ladies Stainless steel 682 /685 1971 768.0805 Ladies bracelet Range of metal cases 682 /685 1971 ST 768.0804 Ladies bracelet Stainless steel 685 1972 ST 768.0806 Ladies bracelet Stainless steel 700 1966 BA 311.090 Limited Edition 12,500 pieces - hand wind Solid yellow gold soldered brclt 700 1968 BA 111.099 Limited Edition 12,500 pieces - hand wind Solid yellow gold(on leather strap) 700 1968 BA 311.108 Limited Edition 12,500 pieces - hand wind Solid yellow gold 700 1968 BC 111.091 Limited Edition 12,500 pieces - hand wind Solid white gold 700 ultrathin 1970 BA 511.8259 Limited Edition 12,500 pieces - hand wind Solid yellow gold 700 solid gold balance 1962 BC 111.1719 Limited Edition 12,500 pieces - hand wind 18k solid white gold 700 solid gold balance 1962 BA 111.1719 Limited Edition 12,500 pieces - hand wind Solid yellow gold 700 1969 BA 711.5758 Swiss Collection, 12500 pieces - hand wind Solid yellow gold 700 1970 BC 311.4147 Extraflat - hand wind Solid white gold 700 1971 BA 711.1729 Limited Edition 12,500 pieces - hand wind Solid yellow gold 700 1972 BC 711.1723 Limited Edition 12,500 pieces - hand wind Solid white gold and bracelet 700 1973 BC 711.1814 Ltd Ed. 2 piece case, amethyst crystal, guilloche bezel Emeralde - hand wind 18k gold with woven wire bracelet 700 1973 BA 711.1858 Ltd Ed. 2 piece case. Rectangular. Guilloche bezel quartz crystal Emeralde - hand wind 18k gold with woven wire bracelet 711 1973 BA 155.013 Barrel shaped case, large bevels, with strap 18k gold 711 1974 BA/BC 351.0013 Some COSC Haute de Forme Solid yellow or white gold 711 1974 BA 351.0064 Designer: Filigre bezel and bracelet 18k gold 711 1976 BA 351.8656 Millet et UNe Nuits Collection (with cufflinks and ring) 18k Gold 711 1976 BA 351.8657 Millet et Une Nuits collection (with cufflinks and ring) 18k gold 711 1974 ST 355.0815 Barrel, rectangular dial. Stainless steel 711 1975 BA/BC 351.8359 H Design: with chunky 18 bracelet Solid yellow or white gold Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 3

711 /712 1971 BA 153.0033 Superflat round case 18k solid gold 711 1974 ST 355.0809 s-sided dial, hidden lugs,bracelet Stainless steel 711 Non COSC /712 COSC, 1972 BA/BC 353.0009 33mm Ultrathin Solid yellow or white gold 711 1974 ST 155.0015 6 sided dial hidden lugs Stainless steel, Omega fastener 711 1974 351.8294 Square dial, integrated Brushed case in 18k /other metals 711 1975 ST DD 355.0814 Square dial, integrated bracelet Stainless steel 711 1975 155.021 Square dial, integrated bracelet SS and 14k gold Omega fastener 711 1976 355.0815/155.0022 Barrel shaped integrated bracelet Stainless steel 712 1966 167.015 Replacement for 167.005 Range of metal cases 712 1966 167.021 Replacement for 167.005 Range of metal cases 712 1967 BA 153.014 Tonneau Solid yellow gold 712 1967 ST 153.014 Tonneau Stainless Steel 712 1967 163.001 34mm round case Yellow, pink and white gold and SS 712 1967 163.002 Rounded case, small lugs Gold 712 1967 153.0025 Tonneau 712 1971 BA 153.0035 Long square with angled corners 18k 712 1972 BA 152.0039 Round solid gold dial in some examples 18k Gold 712 1972 BA 153.0040 Superflat rounded square 18k solid gold 712 1972 BA/ST 157.0001 34.5mm round Solid gold and stainless steel 712 1973 153.0042 Rectangular with triangle lugs Gold and various metals 712 1973 151.0032 Cushion on leather Gold 712 1973 BA 157.0003 Special cambered case ceramic 18k gold with ceramic cover 712 1973 353.0016 Square small dial in wide bracelet 18 k gold 712 1973 353.0019 Rectangular, int. Brct with tapestry guilloche dial 18k gold various 712 1973 BA/BC 353.0020 Rectangular, int. Brct with tapestry guilloche dial Solid yellow or white gold 712 1973 353.0021 Horiz rounded rectangular dial integrated brclt Solid yellow or white gold 712 1974 BA 353.0010 Rectangular with gold mesh brclt 18k gold 712 1974 BA 351.7255 Round with integrated bracelet 18k gold 712 1974 BC 353.013 Ultra flat Milanese bracelet 18k gold 712 1976 ST 357.0800 Integrated bracelet Stainless steel 712 1976 Watch head 8319 Tonneau with integrated bracelet 18k gold 725 1997 BA/DB 566.1201 Mechanical - special 18k SG or SS with solid gold bezel 725 /1250 1996 1292.30.00 My choice Range of case metals 725 exclusive Geneva stripes 1995 BA 766.1201 Cloisonne dial Observatory 18k solid gold case and bracelet Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 4

751 1966 168.016 [Not specified] Full range of metal cases 751 1966 BA 168.019 "C" full range of metal cases 751 1966 ST 168.019 "C" Full range of metal cases 751 1967 CD 168.029 "C" Gold-cap on stainless steel 751 1967 ST 168.029 "C" Knurled bezel Full range of metal cases 751 1969 BA 368.0845 Integrated with Knurled bezel 18k solid yellow gold 751 1969 ST 368.0845 C with knurled bezel Stainless steel 751 1970 ST/DD 168.0041 [Not specified] SS - white or yellow gold bezel 752 1978 ST 366.0857 Barrel round - non COSC Stainless steel integrated 1000 /01/02 1969 CD 166.063 "tonneau" (35,7 X 35,8 mm) Gold cap on stainless steel 1000 /1002 1969 166.0052 [Not specified] Range of metal cases 1000 /1002 NON COSC 1969 166.0056 Range of metal cases 1001 1969 BA/ST 168.0042 [Not specified] Solid yellow gold and SS cases 1001 1969 366.0819 Integrated bracelet model Range of metal cases 1001 1969 BA 368.0846 Integrated bracelet model case 168.0046 SS & Solid 18k gold 1001 1969 BA/ST 368.0847 Integrated bracelet model Solid yellow gold & SS bracelet 1001 1969 ST 368.0846 Stainless steel 1001 1968 ST 168.0033 33.1 mm round case 19mm lug size SS and 18K solid yellow or pink gold 1001 1970 BA 168.0053 Press-in case back Solid yellow gold 1001 1970 168.0044 Tonneau Stainless steel or 22k gold plate 1011 1972 BA/DD/ST 368.0852 Integrated bracelet Solid yellow gold, SS or Steel/14k 1011 1972 BA/DA/ST 168.0055 Round case integrated bracelet 18k gold, 14k or SS 1011 1972 CD/ST 168.0056 "C" Gold cap or stainless steel 1011 1972 CD/ST 168.0058 Tonneau Gold cap or stainless steel 1011 1974 DD 368.0855 Octagonal Stainless steel with solid gold bezel 1011 1974 ST 168.0065 Special Piepan type Stainless steel 1011 1974 BA/ST 368.0855 Octagonal Solid gold or stainless steel 1012 1977 PN 166.0228 Non COSC Gold-plated, SS case back 1012 1975 166.0234 Non COSC Octagonal case (with bracelet) SS and gold plate 1012 1975 166.0220 Non- COSC TV style Gold plate & SS 1012 1978 198.0060 Non COSC Various Metals. 1020 1978 BA 366.0859 Non COSC Integrated Brclt Solid yellow gold Non COSC Octagonal with bracelet. Rounded coin 1020 1978 approx 166.0219 edge dial Gold plate & also SS 1020 1978 CD 166.0247 "C" Non COSC Gold-cap on stainless steel Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 5

1020 1977 approx 166.0261 Rounded, coin edge bezel, integ bracelet Non COSC Two tone SS & gold 1021 1972 BA/ST 368.0851 Barrel round dial integ bracelet Solid yellow gold or stainless steel 1021 1972 BA/CD/ST 168.0057 "C" knurled bezel Solid gold, gold cap or SS 1021 1973 BA/DD/GD 368.0854 Roounded square integrated Brc Solid gold, SS & 14k or gold filled 1021 1974 BA 168.0063 TV shape case 18k solid gold 1021 1974 ST 168.0063 TV shape case Stainless steel 1021 1974 ST 368.0858 TV shape case Stainless steel with bracet 1022 1975 166.219 Octagonal case Non COSC Gold Plate 1109 / 1111 1991 BA 168.0075 Date Chronometre 18k solid gold 1109 /1111 1987 368.1075 [Not specified] Full range of metal cases 1109 /1111 1987 368.1075 [Not specified] 18k solid, SS with solid bezel or SS 1109 /1111 1987 368.1075 [Not specified] Range of case options 1109 /1111 1991 DB 168.0075 Date Chronometre Steel/gold on leather 1109 /1111 1991 ST 168.0075 Date Chronometrre Stainless steel on leather 1111 1984 DD 368.0865 Manhattan (Later repl 368.0875) Stainless steel/gold 1111 1984 ST 368.0865 Manhattan Stainless steel, integrated bracelet 1120 1995 1102 COSC Solid yellow gold 1120 1995 1920.18.00 Certified Chronometre Solid gold 1203 1973 BA/ST 398.0820 Megasonic Barrel Solid gold or stainless steel 1203 1983 ST 398.0820 Manhattan Stainless steel 1230 1973 ST 398.0829 Octagonal integrated bracelet Stainless steel 1250 1970 BA 198.0003 Electronic Solid yellow gold 1220 720 Hz 1973 BA/ST 398.0819 Electronic Stainless steel 1250 f300 1970 BA 398.0008 Electronic Solid yellow gold 1250 f300 1971 BA/ST 398.0803 Electronic Solid yellow gold or stainless steel 1250 f300 1971 198.0002 Electronic Range of metal cases 1250 f300 1971 BA/ST 398.0801 Electronic integrated bracelet Solid gold and stainless steel 1250 f300 1972 BA/CD/ST 198.0027 Electronic Solid yellow gold, gold cap & SS 1250 f300 1972 BA 398.0813 electronic 18k solid gold 1250 f300 1974 MD/ND 198.0075 Electronic Gold-plated SS back or all plated 1250 f300 1972 ST 398.0813 Electronic Stainless Steel 1260 f300 1972 GD 198.0034 Gold-plated 1260 f300 Mosaba 12 jewels 1976 MD 198.0076 Made for US market Gold plated 1260 f300 Mosaba 12 jewels 1976 ST 198.0076 Made for US market Stainless steel Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 6

1300 Beta 21 Electroquartz 1970 BA 396.0802 Electronic Solid yellow gold 1300 Beta 21 Electroquartz 1970 BA/ST 196.0005 Electronic Solid gold or stainless steel 1301 f8192 Hz 1972 ST 196.0008 Electroquartz Tonneau Stainless steel 1301 f8192 Hz 1972 ST 198.0022 Electroquartz Tonneau Stainless steel 1301 f8192 Hz 1973 ST 396.0807 Electroquartz kurled bezel Stainless steel 1301 13 jewels 1972 BA 191.0002 Electronic 1000 pieces only Solid yellow gold 1302 Beta 21 1974 BA 191.0004 Electroquartz rectangular case Solid yellow gold 1310 8 jewels 1976 ST 396.0846 Megaquartz Stainless steel integrated 1310 1973 BA 196.0015 Gold on leather 1310 1973 BA/ST 396.0811 [Not specified] Solid yellow gold or stainless steel 1310 1973 DD 396.0810 Megaquartz Stainless steel with solid gold bezel 1310 1973 BA/ST 396.0809 [Not specified] 18k solid gold or stainless steel 1310 1974 MD/ND/ST 396.0822 electro quartz Stainless steel or gold plated 1330 1974 BA 391.8605 Octagonal, faceted bezel Solid yellow gold 1330 1976 ST 391.0011 [Not specified] Stainless steel 1330 1977 BA/BC 391.8649 Soldered bracelet Solid yellow or white gold 1330 3 jewel quartz 1976 JD 191.0032 Round case Gold plated 1330 3 jewel quartz 1976 ST 191.0032 Round case Stainless stell 1330 Quartz 1976 BA/ST 191.0014 [Not specified] Solid yellow gold or stainless steel 1330 Quartz 1976 BA 391.8603 Tonneau Solid yellow gold 1330 Quartz 1976 BA/ST 191.0012 [Not specified] Solid Gold or stainless steel 1332 1979 BA/JD/ST 196.0138 34mm round case Solid yellow gold, Gold plate & SS 1333 1980 BA/JD/ST 198.0126 [Not specified] Solid gold, SS, or gold filled 1333 17 jewels 1980 ST 398.0857 Tonneau Stainless steel/ integrated bracelet 1333 17 jewels 1982 DD 198.1779 Marine (porthole style) Stainless steel with solid gold bezel 1333 17 jewels 1982 ST 198.1779 Marine (porthole style) Stainless steel 1343 1977 BA/BC 398.8950 Octagonal diamond bezel Solid yellow or white gold 1343 1977 MD 196.0071 Round case made for US market Gold-plated 1343 1978 BA/DD 198.0114 Octagonal Solid yellow gold or 14k and SS 1343 1978 DD/ST 398.0852 Octagonal Stainless steel 1348 1979 6171 RB US made C case knurled bezel Gold-filled 1350 1977 BA/ST 591.0002 Oval octagonal Solid gold or stainless steel 1350 /1351 1978 DA 795.0803 [Not specified] Stainless steel with solid gold bezel 1351 3 jewels 1978 DD 398.0801 Rounded rectangle Quartz 14k bezel, int s/gold bracelet Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 7

1351 3 jewels 1978 ST 395.0801 Rounded Rectange case Quartz SS with 14k bezel or SS 1353 1977 ST 591.0004 Square case Stainless steel 1353 1978 ST 595.0006 Ladies Stainless steel 1375 1982 DD 795.0828 Manhattan Stainless steel with solid gold bezel 1379 /1438 1987 BA/DB 196.0360 Quartz 18k solid or SS with solid gold bezel 1380 1981 DD/ST 796.0824 Marine Stainless steel or SS and gold 1387 1980 DA 795.0816 Torsade Stainless steel with solid gold bezel 1418 1973 DD/DS 398.0820 Manhattan 5600 units SS with yellow or pink gold bezel 1418 1981 DD 397.0801 Manhattan 5600 units Stainless steel with solid gold bezel 1418 1983 DD/DS 398.0820 Manhattan SS and 14k gold (yellow or pink) 1422 1982 BA 398.0864 Manhattan Solid yellow gold 1422 1983 BJ 498.0001 Manhattan (285 diamonds) Solid yellow, white and pink gold 1424 1994 DE 796.1180 Quartz SS with sg bezel 1430 1986 DR/ST 396.1076 Integrated bracelet SS with gold bezel or SS 1431 1983 BA/DA/DD 398.0866 Manhattan (optional diamonds) Solid gold, SS & 18k or SS & 14k 1431 1983 BA 498.0017 Round case Solid yellow gold 1431 1983 DD 398.0867 Manhattan Stainless steel with solid gold bezel 1431 BA 398.0867 Manhattan Solid Gold 1431 1983 ST 398.0867 Manhattan Stainless steel 1431 1984 BA 498.0021 Diamond Dial 247 diamonds Solid yellow gold diamond bezel 1431 1985 DD/DS/ST 398.0876 Manhattan SS, SS & 14k, or SS 18k pink gold 1438 /1441 1987 396.108 Quartz Range of metals/ bracelet options 1444 /1445 1984 DB 398.0869 Manhattan COSC Stainless steel with solid gold bezel 1444 /1445 1987 DB 396.1070 Quartz Stainless steel with solid gold bezel 1444 /1445 1987 BA/DE 396.1070 quartz 18k SG and SS and 18k bezel 1444 /1445 1987 BA/DB/ST 196.1070 Quartz 18k SG/ SS with 18k or SS 1444 1987 396.1069 Quartz 18k solid, SS with solid bezel, or SS 1444 1992 296.1070.100 Quartz Range of case options 1445 1987 BA 396.1071 Day-date, roman num. bezel Solid yellow gold 1450 1984 BJ 895.0011 Diamond dial 160 diamonds Gold with diamonds 1450 /1455 1986 BA 895.1076 Manhattan diamond bezel Solid yellow gold 1455 /1456 6 jewels 1989 BA 895.121.OEO Round case diamond bezel 18k Solid gold integrated bracelet 1455 1986 BA 795.0872 Diamond dial optional Solid yellow gold 1455 1987 BA 695.1080 Quartz 34 diamond bezel Solid yellow gold Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 8

1455 1987 795.108 Quartz Range of SS with SG bezel options 1455 1987 795.108 Quartz Range of case and bracelet options 1456 1996 1267 - Exclusive Omega Mvt 18k ans SS diamond bezel 1456 1997 1262.75.00 - Quartz MO Pearl dial Stainless steel with solid gold bezel 1456 1998 1465.71.00 My Choice - Quartz Stainless steel 1456 1999 1161.81.00 My choice - Quartz Solid yellow gold 1456 2003 1165 Ladies' Mini Quartz Solid white gold 1510 electronic 1973 BA/ST 396.0806 Megaquartz Solid yellow gold or stainless steel 1511 Megaquartz 1974 ST 398.0836 Marine Chronometer 1000 units Stainless steel with solid gold bezel 1516 Megaquartz 1975 ST 398.0832 Marine Chronometer 8000 units Stainless steel with solid gold bezel 1532 1996 1312 Quartz Stainless steel with solid gold bezel 1532 1996 1512 Quartz Stainless steel 1600 LED 1972 BA/GD/GF 396.0812 Time Computer/15000 pieces Solid yellow gold/or YG & WG filled 1601 1973 ST 396.0832 Time Computer II Stainless steel 1601 1974 GD/GF 396.0831 Time Computer II 15000 units Yellow or white gold-filled 1602 LED 1975 GD/ST 396.0833 Time Computer III Gold filled or Stainless steel 1680 1997 1552.3 Quartz Stainless steel NOTES: Approximately 90% of the data in these tables was extracted from the old Omega vintage database. It was a feature of this database not to always list each case metal prefix (e.g. CD, BA, etc., denoting gold cap and solid gold). If this catalogue only mentions one prefix, please do not assume that the model was limited to the specific case metal denoted. If you encounter a case metal that is not listed here and you have done due diligence on the watch, you can safely assume it was also produced in other metals. Around 10% of the watches listed in this catalogue do not appear in the Omega database. In each instance the watch and case number has been verified. Again, all case metals may not be listed, because only case metals encountered and verified appear in the listings. Desmond Guilfoyle http://omega-constellation-collectors.blogspot.com/ 2006-2013 9