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Fig. 1

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Fig. 2

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Fig. 3

Baumgartner 866(digital)

manual wind
sweep second
digital display: minute, jumping hour, 12 or 24h

12 / 13.5''', Dm= 26.45 / 30.7mm
Do= 26.9 / 31.15mm
H= 6.2mm
(winding gear, lever cock +0.5mm)
F= 2.15mm
T= 3.85mm
1/17/21 jewels
f = 18000 A/h
power reserve 33h

Balance staff U2134 / U2133 / U2258
impulse jewel / impulse finger / tip pinions

Stem W2321

Mainspring / battery
1.15 x 13.0 x 0.135mm


Comments about the data

pin-lever escapement
indirect minute, hand friction clutch on barrel (Roskopf type)
hour only ahead settable (minute between 52 and 60 forth and back)
signed only as 866

866: sweep second
866(CLD): sweep second, date
866(CLDD): sweep second, day, date
866(digital): sweep second, digital display
866(digital,CLD): sweep second, digital display, date
875: sub second

Example, year: signature; shock device
1-2) ca. 1975: BFG 866, 1, Sorna Watch SA DE, Swiss Made, 1 Jewel - BFG 866; Novodiac alt
3) ca. 1970: BFG 866, GP, Swiss Made, 17 Jewels
(Baumgartner 866(CLD), 13.5''')

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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