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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Alpina 337

stem wind and set
sub second

17''', Dm= 38.2mm
H= 5.0mm (5.15mm with winding gear)
f = 18000 A/h
15 jewels
f = 18000 A/h
power reserve 30h

Balance staff U212

Stem W1793

Mainspring / battery
1.90 x 15.0 x 0.20mm

1.85 x 1.02 / 0.22mm

Comments about the data

open face calibre
Breguet hairspring
options: hack feature, Reed's regulator

open face / hunter respectively:
331/332: H=4.9mm, 17 Jewels, Reed's regulator
333/334: H=4.9mm, 17 Jewels, Reed's regulator
335/336: H=4.9mm, 15 Jewels, hack feature
335/336: H=5.0/5.2mm, stronger main spring

Example, year: signature; shock device
ca. 1930: 623955, Alpina

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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