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| Index | Timepiece Archive, Categories | Archive: Watch Movements | Timepiece Market |
 Fig. 1  Fig. 2 | Helvetia 51L Features stem wind and set sub second Data 16''', Dm= 35.75mm, Do= 36.5mm H= 4.2mm F= 0.5mm T= 1.9mm 15 jewels f = 18000 A/h power-reserve 32h Balance staff U2668 Stem W1774 Mainspring / battery Zf1416, 1.70 x 13.0 x 0.18 x 330mm Hands 1.50 x 0.90 / 0.22mm Comments about the data | Remarks open face calibre family: 51L: open face calibre 51S: hunter calibre suffix I: meaning unknown Example, year: signature; shock device ca. 1930: 8 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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