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Fig. 1

View picture in original size
Fig. 2

Landeron 80

manual-wind chronograph, 60s, 30/45min, cam switched
sub second
Tag, pusher at 10h
date hand at 6h, pusher at 8h
month, pusher at 2:30h

13.75''', Dm= 31.0mm, Do= 31.5mm
17 jewels
f = 18000 A/h
power reserve 41h

Balance staff U1457

Stem W1158

Mainspring / battery
Zf978, 1.35 x 12.0 x 0.14 x 360mm

1.85 x 1.30 x 0.25 / 0.27 x 0.20mm

Comments about the data

1937-1970, >3.500.000 (all derivatives based om Landeron 48)
There were various chrono mechanisms. And as their parts often were interchangable, occasionally series were produced with parts of different calibres.
minor differences between 80, 180, modified parts interchangable

51, 151: 13.75'''
55: 14'''
57: 14''', calendar
59: 13.75''', calendar
80, 180: 13.75''', calendar, new pusher layout
81, 181: 13.75''', calendar, moon phase
82: 13.75''', date at 6h
159: 13.75''', date hand at 6h

Example, year: signature; shock device
1) ca. 1945: SXK, Bovet Freres & Co SA, Swiss, 17 Jewels
(Landeron 51)
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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft

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