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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Alpina 107 (Gruen 107, 1077)

Features
manual wind

Data
5.75 x 8.5''', Dm= 12.85 x 19.2mm
Do= 12.85 x 19.7mm
H= 3.4mm
F= 0.3mm
T= 1.5mm
15/17 jewels
f = 20160 A/h (18000 A/h*)
power-reserve 40h

Balance staff U1964

Stem W2077

Mainspring / battery
Zf477, 1.10 x 7.0 x 0.09 x 190mm

Hands
1.50 x 0.90 x 0.20mm

Comments about the data

Remarks
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.
(Gruen 1067)

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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


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