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| Index | Timepiece Archive, Categories | Archive: Watch Movements | Timepiece Market |
 Fig. 1  Fig. 2  Fig. 3 | Hamilton 661 (Certina 25-45) Features automatic sweep second Data 11.5''', Dm= 25.6mm H= 6.0mm 17 jewels f = 18000 A/h power reserve 42h Balance staff U2207 Stem W2306 Mainspring / battery 1.25 x 9.5 x 0.10mm Hands 1.50 x 0.90 x 0.18mm Comments about the data | Remarks 1951-1960 (Certina) selfwinding gear from beryllium bronze family: 661: - 690: date Example, year: signature; shock device 1957: Certina, Swiss Made, 23 Jewels, Patents+; Incabloc (Certina 25-45) 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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