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| Index | Timepiece Archive, Categories | Archive: Watch Movements | Timepiece Market |
 Fig. 1  Fig. 2 | Eterna 1248UT Features automatic sweep second Data 11.5''', Dm= 25.6mm, Do= 26.0mm H= 5.9mm F= 1.6mm T= 2.1mm 17/21 jewels f = 18000 A/h power reserve 42h Balance staff U1965 Stem W2061 (replacement W1161) Mainspring / battery 1.50 x 9.5 x 0.10mm Hands 1.50 x 0.90 x 0.21mm Comments about the data | Remarks 1949-1950 first gents automatic-family with ball-bearing rotor (the very first in 1948 was a ladies size: 1194-1199) The simultaneous change from T- to U shock device and to a modified calibre (suffix C) lead to many variants. It is unknown whether all calibres were made in the variant TC (old shock device, new calibre); so only the known are listed here. Even signatures of UT versions were changed to UC (cf. 1247UT). detached manual wind, details cf. 1249UC family/generations: manual wind: 1078: 10.5''' 1079: 11.5''' bumper automatic: 1158: 12.25''' 1159: 13''' rotor automatic, without/with date: 1247/1237: 12.5''' 1248/----: 11.5''' 1249/1239: 13''', rotor like 13.5''' 1253/1243: 13''', rotor like 12.5''' 1254/1246: 13.5''' Example, year: signature; shock device 1950: 3669938, Eterna-Matic, Brev. Dep.; Eterna-U (Eterna 1247UT, 12.5''') Not for Sale! The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating. |
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