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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Buren 30

stem wind and set
sub second

17.5''', Dm= 38.8mm, Do= 39.5mm
H= 4.5mm
(balance bearing +0.3mm)
F= 0.5mm
T= 2.0mm
15 jewels
f = 18000 A/h
power-reserve 29h

Balance staff U1041

Stem W1541

Mainspring / battery
Zf3133, 1.60 x 16.0 x 0.19 x 480mm

1.90 x 1.20 x 0.26mm

Comments about the data

open face calibre
all jewels in setting, among them 3...4 gold settings

Example, year: signature; shock device
1-2) ca. 1930: Genfa Grand Prix, Cal. 30
3-4) ca. 1940: Buren Grand Prix, Cal. 30, Swiss Made, 15 Jewels - BAA

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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