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8 x 11''', Dm=Do= 17.85 x 24.55mm
(rests on corners)
f = 18000 A/h
Balance staff U1733
Mainspring / battery
1.05 x 9.5 x 0.1025 x 345mm
1.10 x 0.60 / 0.15mm
Comments about the data
This calibere was made with varying heights over a long periode, and passed several designation systems.
So designations exist which are not yet listed here.
base calibre H= 3.35mm:
410: sub second
411: sweep second
412: sub second, date
base calibre H= 3.5mm:
11LO, 424, 438: sub second
437: sweep second
436, 486, 806: sub second, date
base calibre H= 3.9mm:
413: sub second
Example, year: signature; shock device
ca. 1945: 292199, VXN, LeCoultre Co, Swiss, 17 Jewels
(LeCoultre 438/4C Am)
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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