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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Certina 25-66M

Features
manual wind
sweep second

Data
11.5''', Dm= 25.6mm, Do= 26.0mm
H= 3.85mm
F= 1.55mm
T= 2.25mm
17 jewels
f = 19800 A/h
power reserve 46h

Balance staff U2822

Stem W2822

Mainspring / battery
1.20 x 10.0 x 0.12mm

Hands
1.50 x 0.90 x 0.18mm

Comments about the data

Remarks
1975-1977
like 25-66, but balance with 3 instead 2 spokes, and bigger plate recess for lever cock
As old and new components were mutually interchangable, they were arbtrarily mixed during the transition periode, and also the signatures were scarcely correct.

family/generations:
19800 A/h:
25-65: automatic
25-651: automatic, date
25-652: automatic, day, date
25-66: manual wind
25-661: manual wind, date
28800 A/h, ball bearing for minute staff:
25-671: automatic, date
25-672: automatic, day, date
28800 A/h, ball bearing plate redesigned:
25-68: automatic
25-681: automatic, date
25-682: automatic, day, date

Example, year: signature; shock device
1975: Certina, 25-66, Swiss, 17 Jewels; Incabloc
(signature still without "M")

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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