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| Index | Timepiece Archive, Categories | Archive: Watch Movements | Timepiece Market |
 Fig. 1  Fig. 2 | Omega 251 Features manual wind sweep second Data Dm= 13.5 x 17.5mm Do= 13.5 x 18.0mm H= 4.15mm F= 0.8mm T= 1.6mm 17 jewels f = 21600 A/h power reserve 48h Balance staff U1603 Stem W1298 Mainspring / battery 1.20 x 6.5 x 0.08mm Hands 1.10 x 0.70 x 0.15mm Comments about the data | Remarks 1938-1959, >1400000 (whole family except 245) family/generations: no second: 240 (R13.5 until 1949): 15 jewels 241: 15 jewels, antimagnetic 242: 17 jewels 243: 17 jewels, antimagnetic 244: 17 jewels, antimagnetic, Incabloc 245: ring balance 19800 A/h instead of screw balance 21600 A/h sweep second: 250 (R13.5SC until 1949): 17 jewels 243(251): 17 jewels, antimagnetic 252: 17 jewels, antimagnetic, Incabloc Example, year: signature; shock device 1961: 17825778, Omega Watch Co Swiss, 17 Jewels; Incabloc (Omega 252) 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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