Fig. 1
Fig. 2
Fig. 3
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Baumgartner 866
Features
manual wind
sweep second
Data
12 / 13.5''', Dm= 26.45 / 30.7mm
Do= 26.9 / 31.15mm
H= 4.65mm
(winding gear, lever cock +0.5mm)
F= 0.6mm
T= 2.3mm
1/17 jewels
f = 18000 A/h
power reserve 39h
Balance staff U2134 / U2133 / U2258
impulse jewel / impulse finger / tip pinions
Stem W2321
Mainspring / battery
1.15 x 13.0 x 0.135mm
Hands
1.89 x 1.09 x 0.28mm
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Remarks
pin-lever escapement
indirect minute, hand friction clutch on barrel (Roskopf type)
family:
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. 1970: BFG 866, Basis Watch, Swiss Made, 1 Jewel
(13.5''')
3) ca. 1975: BFG 866, RC, Dolmy Watch Ltd, Swiss Made, 1 Jewel
(Baumgartner 866(CLD), 12''')
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