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Fig. 1

Baumgartner 677

simple manual-wind chronograph, 60s, start/stop of the sweep second, no reset feature
sweep second

13''', Dm= 29.3mm
H= 6.1mm
0 jewel
f = 17280 A/h
power reserve 35h

Balance staff U1379 / U1362 / U1328
balance with impuls pin/finger/pointed staff

Stem W929

Mainspring / battery
1.50 x 16.0 x 0.16mm

1.99 x 1.42mm

Comments about the data

pin-lever escapement
indirect minute, hand friction clutch on barrel (Roskopf type)
signature often or always Baumgartner 670
differences not known between 677, 680
666: without second
670: second, with/without date
677, 680: second start/stop

Example, year: signature; shock device
ca. 1950: Swiss Made

© B. Schulz, shop-wittlich.de

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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