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| Alpina 157 (Gruen 157) Features manual wind sub second Data 8.75 x 12.5''', Dm= 19.8 x 28.15mm H= 4mm 15 jewels f = 18000 A/h power reserve 41h | Remarks 1925- Alpina Gruen Gilde 1929-1937 bimetallic screw balance straight lever (ligne angulaire) Example, year: signature; shock device ca. 1935: 157, 157 - D 172, Brevet+ |
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