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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Dugena 2009 (Bifora 910/1(CLD))

Features
manual wind
sweep second
date: set by changing 21-24h

Data
11.5''', Dm= 25.6mm
H= 3.65mm
(winding gear +0.4mm)
F= 0.8mm
T= 2.15mm
17/23 jewels
f = 18000 A/h
power reserve 39h

Balance staff U2912

Stem W2933

Mainspring / battery
Zf663, 1.20 x 8.0 x 0.09 x 250mm

Hands
1.40 x 0.85 x 0.22mm

Comments about the data

Remarks
1964-
in later samples setting lever with pin instead screw, and minute wheel with pin (cf. Bifora 91/1)
these parts can be used for older samples, if the minute-wheel pin is removed from the plate, and/or a modified setting-lever spring is used

family/generations:
710: 9.75''', sweep second
712: 9.75''', sub second
1149: 11.5''', sweep second, date
modified setting lever and minute wheel:
2003: 9.75''', sweep second
2008: 9.75''', sub second
2009: 11.5''', sweep second, date

Example, year: signature; shock device
ca. 1970: Bifora 910/1; Bifora-Bishock
(Bifora 910/1(CLD))

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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