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Fig. 7

Gruen 480SS

Features
automatic
sweep second

Data
9.5 x 10.5''', Dm= 21.0 x 23.45mm
Do= 21.0 x 23.9mm
H= 5.8mm
F= 1.4mm
T= 1.7mm
17 jewels
f = 18000 A/h
power reserve 30h

Balance staff U2148

Stem W2333

Mainspring / battery
1.17 x 8.0 x 0.0925 x 240mm

Hands
1.22 x 0.72 x 0.20mm

Comments about the data

Remarks
1951-
Breguet hairspring
detached manual wind
earlier samples with stronger bevelled plate
detail modifications during production periode (cf. photos)

family/generations:
480 : 17 jewels, sub second
480SS: 17 jewels, sweep second
480-3SS: 23 jewels, sweep second, gilt
930 : 23 jewels, sub second
930SS: 23 jewels, sweep second

Example, year: signature; shock device
1-2) ca. 1951: Autowind-Patented, Gruen Watch Co Precision, Swiss, 17 Jewels - *; Incabloc
3-5) ca. 1955: GXC, Autowind-Patented, Gruen Watch Co Precision, Swiss, 17 Jewels - *; Incabloc
6.7) ca. 1955: GXC, Autowind-Patented, Gruen Watch Co Precision, Swiss, 17 Jewels - *; Incabloc

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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