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 Fig. 1  Fig. 2 | Landeron 57 Features manual-wind chronograph, 60s, 30/45min, cam switched sub second Tag, pusher at 1:30h date hand at 6h, pusher at 4:30h month, pusher at 1:30h Data 14''', Dm= 31.8mm 17 jewels f = 18000 A/h power reserve 41h Balance staff U1457 Stem W1158 Mainspring / battery Zf978, 1.35 x 12.0 x 0.14 x 360mm Hands 1.85 x 1.30 x 0.25 / 0.27 x 0.20mm Comments about the data | Remarks 1937-1970, >3.500.000 (all derivatives based on Landeron 48) There were various chrono mechanisms. And as their parts often were interchangable, occasionally series were produced with parts of different calibres. family: 51, 151: 13.75''' 55: 14''' 57: 14''', calendar 59: 13.75''', calendar 80, 180: 13.75''', calendar, new pusher layout 81, 181: 13.75''', calendar, moon phase 82: 13.75''', date at 6h 159: 13.75''', date hand at 6h Example, year: signature; shock device 1) ca. 1945: SXK, Bovet Freres & Co SA, Swiss, 17 Jewels (Landeron 51, 13.75''') (Landeron 54) 2) 1962: old data sheet 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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