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View picture in original size
Fig. 1

View picture in original size
Fig. 2

ETA 931

Features
manual wind
sub second

Data
11.5''', Dm= 25.6mm, Do= 26.0mm
H= 3.5mm
F= 1.3mm
T= 1.7mm
15/17 jewels
f = 18000 A/h
power reserve 41h

Balance staff U3060 / U1424
hairspring collet 0.5mm/0.6mm

Stem W832, W1161

Mainspring / battery
Zf1269, 1.55 x 9.0 x 0.10 x 290mm

Hands
1.40 x 0.80 / 0.22mm

Comments about the data

Remarks
differences not known between 930, 931, 935, 937, 942, 973, 1015, 1016, 1018, 1024
likely just different bridge designs (cf. ETA 930)

family:
900: 10.5''', sub second
901: 10.5''', sweep second
930: 11.5''', sub second
932: 11.5''', sweep second

Example, year: signature; shock device
ca. 1945: 6, Swiss Made, 15 Jewels - ETA
(ETA 930)

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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