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View picture in original size
Fig. 1

Baumgartner 58

manual wind
sweep second

12.5 / 13.5''', Dm= 28.0 / 30.7mm
Do= 28.4 / 31.1mm
F= 1.0mm
T= 2.4mm
0/1 jewels
f = 18000 A/h

Balance staff U3067 / U3215 / U3068
impulse jewel, balance collet 0.70mm / 0.54mm / impulse finger

Stem W3047

Mainspring / battery
1.25 x 10.5 x 0.125mm

1.65 x 1.10 x 0.21mm

Comments about the data

pin-lever escapement
indirect minute, hand friction clutch on barrel (Roskopf type)
mostly or always signed as 158

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. 1965: BFG 158, Swiss Made, 1 Jewel

© B. Johnson

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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