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| Index | Timepiece Archive, Categories | Archive: Watch Movements | Timepiece Market |
 Fig. 1  Fig. 2  Fig. 3  Fig. 4 | Hamilton 620 (Buren 1005) Features automatic sweep second Data 12.5''', Dm= 28.15mm, Do= 28.5mm H= 4.2mm F= 1.5mm T= 1.9mm 17 jewels f = 18000 A/h power reserve 42h Balance staff U2490 Stem W2403 Mainspring / battery 1.00 x 9.5 x 0.095mm Hands 1.50 x 0.90 x 0.22mm Comments about the data | Remarks 1957-1962 first movement family with micro rotor selfwinding gear with direction switching by a pinion floating between two huge jewels (Fig.4) in 17-jewels variants one of these jewels substituted by polished steel disc family/generations: 663, 666: second with friction spring 619: second with double third wheel, date 620: second with double third wheel Hamilton designations of other Buren calibres will be added, as soon as they become known. Example, year: signature; shock device ca. 1960: HYL, BAA, 1005, Hamilton Watch Co., 620, Swiss, 17 Jewels; Incabloc 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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