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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Favre-Leuba 257

manual wind
sweep second

11.5''', Dm= 25.6mm, Do= 26.0mm
H= 3.1mm
F= 1.1mm
T= 1.5mm
17 jewels
f = 18000 A/h
power reserve 48h

Balance staff U3033

Stem W3022

Mainspring / battery
1.55 x 6.5 x 0.065 x 210mm

1.30 x 0.80 x 0.18mm

Comments about the data

balance bridge
two barrels coupled in parallel
winding details see Favre-Leuba 253
detail modifications during production periode (cf. Favre-Leuba 253)

sweep second:
250: 10.5'''
251: 11.5'''
252: 10.5''', hidden winding gear
253: 11.5''', hidden winding gear
255: 11.5''', date
257: 11.5''', hidden winding gear, date
259: 11.5''', hidden winding gear, enhanced date
no second:
270: 10.5'''
271: 11.5'''
272: 10.5''', hidden winding gear
273: 11.5''', hidden winding gear
275: 11.5''', date
277: 11.5''', hidden winding gear, date
279: 11.5''', hidden winding gear, enhanced date

Example, year: signature; shock device
ca. 1965: Favre-Leuba, Swiss Made; 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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft

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