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View picture in original size
Fig. 1

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Fig. 2

View picture in original size
Fig. 3

Baumgartner 655

stem wind and pin set
sub second

19.5''', Dm= 43.25mm, Do= 44.0mm
H= 5.1mm
(winding gear, cocks +0.7mm)
F= 0.6mm
T= 2.7mm
1 jewel
f = 18000 A/h
power-reserve 48h

Balance staff Ronda 456

2.15 x 1.20 / 0.30mm

Comments about the data

hunter calibre
pin-lever escapement
indirect minute, hand friction clutch on barrel (Roskopf type)
3 riveted plastic fake jewels (Fig.3)

Swiss Patent 124160:
gear ratios to achive 8 hours run time with each barrel revolution, respectively 48h power reserve (what stroke of genius)
filed 02-10-1927, Baumgartner Frères S.A.

Example, year: signature; shock device
ca. 1930: 655, 4, Swiss Made, Brevet +124160 - Baumgartner

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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