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13''', Dm= 29.0mm, Do= 29.4mm
f = 18000 A/h
power reserve 38h
Balance staff U2452 / U3129
for balance with/without screws
Mainspring / battery
Zf1251, 1.50 x 11.5 x 0.14 x 330mm
1.50 x 0.90 x 0.21mm
Comments about the data
so called Wehrmachtswerk (army movement)
like 1604, but adjustable stud carrier and Lubrifix combined setting for escape wheel
differences not known between 1604N, 1637N
Example, year: signature; shock device
ca. 1960: AS 1604, 1637, Arsenal, Swiss, 17 Jewels - W1; 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.
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