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View picture in original size
Fig. 1

View picture in original size
Fig. 2

View picture in original size
Fig. 3

Alpina 18'''H6.3 hunter

Features
stem wind and set
sub second

Data
18''', Dm= 40.05mm, Do= 40.8mm
H= 6.3mm
F= 0.7mm
T= 2.2mm
15/16 jewels
f = 18000 A/h
power-reserve 34h

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

Hands
1.80 x 1.02 / 0.30mm

Comments about the data

Remarks
open face calibre
bimetallic screw balance
Breguet hairspring
lever and escape wheel anodized aluminium
Option: Reed's regulator (Fig.3)
early two-section regulator for coarse and fine adjustment (Fig.3)
steel bearing for stem (cf. Alpina 18'''H6.3 open-face)
two-part crown wheel with big bearing (cf. Alpina 18'''H6.3 open-face)
This detail is easy to recognise, because the crown-wheel screw head rotates during winding.
This screw is as else common left handed
Attention: The ratchet-wheel screw is also left handed
ebauche or even finished movement from Recta

family:
The variants of open face and hunter with 18''' and 19''' have only base plates with different diameters.

Example, year: signature; shock device
ca. 1915: UH (Union Horlogère) - 55
(Alpina 19'''H6.3 hunter)

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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