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 Fig. 1  Fig. 2 | Hamilton 231 (ETA 2412) Features manual wind Data 6.75''', Dm= 15.3mm, Do= 15.55mm H= 3.4mm F= 1.0mm T= 1.75mm 17 jewels f = 21600 A/h power reserve 40h Balance staff U2520 / U3126 for balance with/without screws Stem W2584 Mainspring / battery Zf1002, 1.40 x 6.5 x 0.07 x 210mm Hands 1.20 x 0.60mm Comments about the data | Remarks Girocap combined settings for escapement wheel indirectly driven minute allows a very big balance differences not known between 23, 231, 232 Example, year: signature; shock device ca. 1965: Hamilton-Logo, Swiss, 17 Jewels - Patented; Kif-Flector (Hamilton 23) 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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