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date: set by +/-24h
11.5''', Dm=Do= 25.95mm
(thickness base plate with date module)
f = 18000 A/h
Balance staff U2336 / U2337
impulse pin / finger
Mainspring / battery
Zf1397, 1.70 x 10.5 x 0.10 x 385mm
1.50 x 1.00 x 0.20mm
Comments about the data
indirect minute, hand friction clutch on barrel (Roskopf type)
stem mechanism without setting-lever spring
The movement has 14 or 15 functional jewels - quite many for a pin-lever movement.
Further bright blue jewels are just for show:
If the impulse pin is made of steel instead jewel, there is such jewel between the bearings of 3rd and 4th wheel, to achieve at least 15 jewels (Fig.1).
Further 2 or 6 jewels to achieve 17 or 21 jewels sit in a tiny round plate, particularly made for this purpose (Fig.4 bottom left).
Example, year: signature; shock device
ca. 1955: 21 Jewels, Unbreakable Spring, Shockproof; Cattin (axial)
(3-4: without date module)
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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