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Fig. 1

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Fig. 2

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Fig. 3

Helvetia 846 (AS 1739)

sweep second

11.5''', Dm= 25.6mm, Do= 26.0mm
H= 4.6mm
(ball bearing +0.05mm)
F= 1.3mm
T= 2.0mm
25 jewels
f = 18000 A/h
power reserve 36h

Balance staff U2981

Stem W2973

Mainspring / battery
1.20 x 9.0 x 0.10mm

1.50 x 0.90 x 0.20mm

Comments about the data

rotor placed out of center
The winding gear is integrated in the movement, instead of attaching it to a manual-wind calibre as usual. This led to a sensationally thin movement at that time.
detached manual wind
escapement from Helvetia
Kif-Duofix combined settings for escape wheel

846: -
847: date

Example, year: signature; shock device
ca. 1965: Helvetia, 846 - 3822; Incabloc

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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