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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Helvetia 33SI

stem wind and set
sub second

18.5''', Dm= 41.1mm, Do= 41.7mm
H= 5.3mm
F= 0.6mm
T= 2.3mm
15 jewels
f = 18000 A/h
power reserve 33h

Balance staff U1003

Stem W1684

1.92 x 1.16 / 0.26mm

Comments about the data

hunter calibre
Breguet hairspring
different bridge shapes (cf. Helvetia 33LI)

30: H= 3.62mm
31: H= 4.2mm
32: H= 4.8mm
33: H= 5.3mm
suffix A, B, I: meaning unknown
Suffix L: open face
suffix S: hunter
Not all possible variants were made; here only variants, known from literature or reality, are listed.

Example, year: signature; shock device
ca. 1930: E.L.S. (Erhard Lauterbach, Sonneberg, DE) - G.W.Co (General Watch Co), 33S, I

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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