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10.5''', Dm= 23.3mm, Do= 23.65mm
f = 18000 A/h
Balance staff U1597
Mainspring / battery
Zf942, 1.35 x 9.0 x 0.10 x 290mm
1.40 x 0.80 / 0.20mm
Comments about the data
stem mechanism without setting-lever spring
Known movement keys show the base plate of this calibre only for the higher Felsa 184. But old variants without and new with setting-lever spring exist also from other Felsa calibres (cf. Felsa 107 and Felsa 107 alt). Moreover the relation to the known Felsa 177 new (with setting-lever spring) was proved by the dimensions of staff and stem.
177: sub second, without setting-lever spring
177 new: sub second, with setting-lever spring
320: sweep second, with setting-lever spring
Example, year: signature; shock device
1928: 5485. MW (Mido Watch Co., 1924), Swiss Made, 2 Adj., 15 Jewels
(Mido 10.5'''H3.3, Felsa 177)
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.
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