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View picture in original size
Fig. 1

View picture in original size
Fig. 2

View picture in original size
Fig. 3

Certina 25-652M

Features
automatic
sweep second
day
date: set by changing 23-24h

Data
11.5 / 12.75''', Dm=Do= 28.5mm
Dm= 25.6mm, Do= 26mm without dial mounting ring
H= 5.95mm
F= 2.55mm
T= 3.25mm
28 jewels
f = 19800 A/h
power reserve 44h

Balance staff U2822

Stem W2822

Mainspring / battery
1.20 x 10.0 x 0.105mm

Hands
1.50 x 0.90 x 0.18mm

Comments about the data

Remarks
1975-1977
like 25-652, 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, 25-651M, Swiss Pat., 28 Jewels; Incabloc
(wrong calibre signature: "1M" engraved separately, but before finshing)

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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