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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Cyma 816

manual wind
sub second

8.75''', Dm= 19.4mm, Do= 19.7mm
H= 3.3mm
F= 0.5mm
T= 1.3mm
15/17 jewels
f = 18000 A/h
power reserve 38h

Balance staff U2066 (L= 2.87mm)

Stem W113

Mainspring / battery
Zf647, 1.20 x 7.5 x 0.07 x 280mm

1.20 x 0.75 / 0.13mm

Comments about the data

option: bimetallic screw balance
option: variant with bimetallic screw balance, Breguet hairspring, separate stud carrier, and improved winding gear
differences not known between 814, 816

814, 816: 3 train cocks
834, 836: 2 train cocks
all escapement parts differing:
814a, 816a: 3 train cocks
834a, 836a, 182: 2 train cocks

Example, year: signature; shock device
1-2) ca. 1930: 72896, Ref.816, Tavannes Watch Co, Patented
3-4) ca. 1940: 118818, Ref.816, Tavannes Watch Co +, Swiss Made, Patented, 3 Adjts., 15 Jewels

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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