Seiko 7N39C Technical Manual

Parts Catalogue / TECHNICAL GUIDE

[SPECIFICATIONS]

Item
Movement
Outside diameter
Casing diameter
Movement size
Height
Time indication
Driving system
Additional mechanism
Loss/gain
Regulation system
Measuring gate by quartz tester
Battery
Jewels
Cal. 7N32C
Cal. 7N33C
Cal. 7N39C
Cal. No.
7N32C
The illustrations refer to Cal. 7N33C.
ø24.0 mm
21.5 mm between 12 o'clock and 6 o'clock sides
21.3 mm between 3 o'clock and 9 o'clock sides
ø23.3 mm
21.5 mm between 12 o'clock and 6 o'clock sides
21.3 mm between 3 o'clock and 9 o'clock sides
2.57 mm
Step motor (Load compensated driving pulse type)
Date calendar
Instant setting device for date calendar
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Train wheel setting device
Electronic circuit reset switch
Battery life indicator
Monthly rate at normal temperature range: less than 15 seconds
Nil
Use 10-second gate.
SEIKO SR920SW, Maxell SR920SW, Sony SR920SW,
Matsushita SR920SW, Eveready 371
Battery life is approximately 5 years.
Voltage: 1.55V
1 jewel
7N33C
2.78 mm
3 hands
Day calendar
Instant setting device
for day calendar
7N39C
(x 1.0)
2.57 mm
2 hands
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