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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Seiko 63A

Features
manual wind
sweep second

Data
12''', Dm= 27.0mm, Do= 27.4mm
H= 3.4mm
(click +0.4mm)
F= 1.25mm
T= 1.7mm
17 jewels
f = 21600 A/h
power-reserve 48h

Balance staff Seiko 311601

Stem Seiko 354601

Mainspring / battery
Seiko 401525

Hands
1.50 x 0.90 x 0.20mm

Comments about the data

Remarks
1976-
no hairspring stud, hairspring clamped directly in terminal
many parts and casing dimensions from equivalent models of the 61XX family

family:
manual wind:
63A: 17 jewels
6310A: Railroad Watch, 21 jewels
automatic:
636: Seiko 5 Akutasu, details not known
639: export only, details not known
6308A: date, 17 jewels
6309A: day, date, 17 jewels
6319A: day, date, 21 jewels
6347A: date, moon phase, 23 jewels
6349A: day, date, 23 jewels

Example, year: signature; shock device
ca. 1980: Seiko, 63A, Japan, 17 Jewels; Diashock

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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