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Fig. 2

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Fig. 4

ETA 1191

manual wind
sweep second

8 x 9''', Dm= 18.5 x 20.8mm
H= 4.3mm
17 jewels
f = 18000 A/h
power reserve 40h

Balance staff U543

Stem W1254

Mainspring / battery
Zf851, 1.30 x 8.5 x 0.10 x 250mm

1.50 x 0.90 x 0.20mm

Comments about the data

option Incastar regulator:
The only large-scale produced regulator featuring a free oscillating hairspring. The end of the spring is fixed between two rollers, adjusting actually its length (photos at the bottom). No isochronism error by the gap between the regulator pins.
differences not known between 1090, 1091, 1190, 1191

Example, year: signature; shock device
ca. 1945: Ernest Borel, Swiss, 17 Jewels; Incabloc
(ETA 1190)

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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