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Fig. 1

View picture in original size
Fig. 2

Dugena 556 (Felsa 4122)

manual wind
option: sub second

7.75''', Dm= 17.2mm, Do= 17.5mm
H= 2.85mm
F= 0.9mm
T= 1.35mm
17 jewels
f = 21600 A/h
power reserve 43h

Balance staff U2951 / U2517
balance collet 0.7/0.75mm

Stem W2639

Mainspring / battery
1.25 x 6.5 x 0.07mm

1.20 x 0.60mm

Comments about the data

designation 556 applied for two different calibres
Girocap combined setting for escapement wheel
uncertain, whether the against the Felsa 4122 modified parts of the Alpina 556 were used

Example, year: signature; shock device
ca. 1965: 816, Alpina 556, Swiss, 17 Jewels; Incabloc
(Alpina 556)

© V05 G00 B01 U12 K01 A01 A10 A12 A14 L00 W02 D01 H00 F00 F01

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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