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Fig. 1

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Fig. 2

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Fig. 3

Certina 28-15

manual wind
sweep second

12.5''', Dm= 28.0mm, Do= 28.4mm
H= 4.4mm
F= 1.3mm
T= 2.3mm
17 jewels
f = 18000 A/h
power reserve 46h

Balance staff U2782

Stem W2805

Mainspring / battery
1.40 x 11.5 x 0.125 x 360mm

1.50 x 0.90 x 0.18mm

Comments about the data

Girocap combined settings for escapement wheel
after 1957 ring balance and mobile stud carrier

28-15: 18000 A/h
28-151: 18000 A/h, date
28-16: 19800 A/h
28-161: 19800 A/h, date
28-163: 19800 A/h, date, circadian rhythm

Example, year: signature; shock device
1-2) ca. 1955: Certina, 28-15, Swiss, 17 Jewels; Incabloc
3) 1957: Certina, 28-151, Swiss, 17 Jewels; Incabloc
(Certina 28-151)

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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