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| Index | Timepiece Archive, Categories | Archive: Watch Movements | Timepiece Market |
 Fig. 1  Fig. 2  Fig. 3 | Alpina 490A Features manual wind sub second Data 8.75 x 12''', Dm= 19.35 x 26.3mm H= 3.8mm 15 jewels f = 18000 A/h power reserve 45h Balance staff U1704 Stem W2063 Mainspring / battery Zf873, 1.30 x 10.0 x 0.11 x 320mm Hands 1.50 x 0.70 / 0.20mm Comments about the data | Remarks straight lever (ligne angulaire) differences not known between 490, 490A Swiss Patent 158882: lever for secure fixing of the stem in the movement, as long as it is in the case shell (lever in Fig.3) filed 11-21-1931, Straub & Co. Fabriques des Montres Alpina (CH) Example, year: signature; shock device ca. 1935: 224282, Alpina 490A - Pat.+158882 (under barrel bridge) 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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