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Fig. 4

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Fig. 6

Gruen 285 Curvex

Features
manual wind

Data
5.5 x 7.25''', Dm= 12.5 x 16.2mm
Do= 12.5 x 16.5mm
H= 4.2mm
F= 2.5mm
T= 1.8mm
17 jewels
f = 18000 A/h
power reserve 40h

Balance staff U1955

Stem W2163

Mainspring / battery
Zf645, 1.20 x 6.0 x 0.07 x 180mm

Hands
0.92 x 0.50mm

Comments about the data

Remarks
1948-1954
Breguet hairspring
minor modifications during production periode (cf. photos)

family:
275: base plate and bridges plane
285: Curvex, base plate and bridges curved

Example, year: signature; shock device
1-3) ca. 1950: B, 689854, GXC, Gruen Watch Co, Switzerland, Curvex Precision Pat, 17 Jewels - *, 9854
4-6) ca. 1950: C, 839159, GXC, Gruen Watch Co, Switzerland, Curvex Precision Pat, 17 Jewels - *

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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