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manual-wind chronograph, 60s, 30/45min, cam switched
date at 6h: set by +/-24h
13.75''', Dm= 31.0mm, Do= 31.5mm
f = 18000 A/h
power reserve 41h
Balance staff U1457 / U3137
balance with/without screws
Mainspring / battery
Zf978, 1.35 x 12.0 x 0.14 x 360mm
1.85 x 1.30 x 0.28 / 0.28 x 0.22mm
Comments about the data
1937-1970, >3.500.000 (all derivatives based on Landeron 48)
There were various chrono mechanisms. And as their parts often were interchangable, occasionally series were produced with parts of different calibres.
189: 13.75''', date
349: 13.75''', hour counter
Example, year: signature; shock device
1) ca. 1955: Swiss Made, 17 Jewels; Incabloc
2) 1962: old data sheet
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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