 | Alpina 117 (Gruen 117)
Features manual wind sub second
Data 8.75 x 12''', Dn= 19.74 x 27.07mm 17 jewels f = 18000 A/h
| Remarks Alpina Gruen Gilde 1929-1937 bimetalic screw balance, Breguet hairspring
Example, year: signature; shock device ca. 1925: 701737, Gruen Watch Co, Precision, Extra, Switzerland, 17 Jewels (Gruen 123)
© F. Lukaszewski
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