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|Alpina 107 (Gruen 107, 1077)|
5.75 x 8.5''', Dm= 12.85 x 19.2mm
Do= 12.85 x 19.7mm
f = 20160 A/h (18000 A/h*)
Balance staff U1964
Mainspring / battery
Zf477, 1.10 x 7.0 x 0.09 x 190mm
1.50 x 0.90 x 0.20mm
Comments about the data
Alpina Gruen Gilde 1929-1937
*) Flume lists the frequencies 18000 and 20160 A/h, but in Gruen catalogs an according remark is missing.
bimetallic screw balance, Breguet hairspring
signature often or always Gruen 106 (example movement out of Alpina watch)
differences not known between 106, 107
probably designations for different base-plate shapes, round corners (Fig.1, 2) or octogonal
Example, year: signature; shock device
ca. 1930: 106, 695647, Gruen Watch Co, Precision, Switzerland, Swiss, 17 Jewels - 695647, Pat.
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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