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Baumgartner 158 31/7(digital,CLD)

sweep second
date: quickset by reverse setting
digital display: minute, jumping hour, 12 or 24h

13.5''', Dm= 30.7mm, Do= 31.1mm
H= 8.35mm
F= 2.85mm
T= 4.25mm
1/17/25 jewels
f = 18000 A/h
power reserve 44h

Balance staff U3069 / U3070
impulse jewel / impulse finger

Stem W3047

Mainspring / battery
1.25 x 10.5 x 0.125mm


Comments about the data

pin lever escapement
detached manual wind
if 25 jewels, barrel with jewel bearing
indirect minute, hand friction clutch on barrel (Roskopf type, although with separate minute wheel)
signed only as 158 31/7

58 : manual wind
158: manual wind, date
1582 : automatic
1582(CLD): automatic, date
detail modifications:
158 31/7 : automatic
158 31/7(CLD): automatic, date
158 31/7(CLDD): automatic, day, date
158 31/7(digital): automatic, digital
158 31/7(digital,CLD): automatic, digital, date

Example, year: signature; shock device
ca. 1975: BFG 158 31/7, Buttes Watch Co, Brevets, Swiss Made, 25 Jewels; Novodiac

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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