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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Bulova 6BC (Aurore-Villeret 120)

Features
manual wind

Data
6.75 x 8''', Dm= 15.3 x 17.95mm
Do= 15.3 x 18.2mm
H= 3.4mm
F= 0.8mm
T= 1.7mm
17 jewels
f = 18000 A/h
power reserve 40h

Balance staff U1782

Stem W2083

Mainspring / battery
Zf928, 1.35 x 7.5 x 0.08 x 250mm

Hands
1.10 x 0.60mm

Comments about the data

Remarks
1949-1951
Breguet hairspring
Aurore-Villeret 120, Bulova 6AH, FHF 120 and the many variants of these calibres are quite equivalent. Exchangability data are contradictionary in the various movement registers. Therefore here only calibres are listed which are mentioned in several registers as derivatives of these base calibres, or which could be checked for equivalence.
The Bulova calibres have design details which are not present in the FHF calibres. So the ebauches came probably from Aurore-Villeret.
differences not known between 6AH, 6AK, 6AM, 6AZ, 6BA, 6BC, 6BE

Example, year: signature; shock device
ca. 1940: BXW, Bulova Watch Co, 17 Jewels
(Bulova 6AH)

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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