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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Alpina 205 (Junghans J33a)

stem wind and set
sub second

18.5''', Dm= 41.4mm, Do= 42.0mm
H= 6.0mm
F= 0.5mm
T= 2.5mm
7 jewels
f = 18000 A/h
power reserve 35h

Balance staff U418

Stem W300

Mainspring / battery
Zf3641, 2.20 x 16.0 x 0.20 x 460mm

1.85 x 1.15 / 0.25mm

Comments about the data

open face calibre
Breguet hairspring
slightly modified train bridge especially for Alpina

205: 7 Jewels, thick alignment pins
215: 15 Jewels, thick alignment pins
245: 15 Jewels, thin alignment pins

Example, year: signature; shock device
ca. 1925: Alpina 205 - 7349

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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