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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
_
_
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
_
_
_
_
1

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Summary of Contents for Seiko 7N32C

  • Page 1 Loss/gain Monthly rate at normal temperature range: less than 15 seconds Regulation system Use 10-second gate. Measuring gate by quartz tester SEIKO SR920SW, Maxell SR920SW, Sony SR920SW, Battery Matsushita SR920SW, Eveready 371 Battery life is approximately 5 years. Voltage: 1.55V...
  • Page 2 PARTS CATALOGUE Cal. 7N32C, 7N33C, 7N39C → Disassembling procedure Figs. → Reassembling procedure Figs. Lubricating: Types of oil Oil quantity Moebius A Normal quantity Battery (See the front page.) Ex. : Cal. 7N33C 0022 247 Battery connection (+) Hour, minute and...
  • Page 3 PARTS CATALOGUE Cal. 7N32C, 7N33C, 7N39C Remarks: 11 Hour wheel 18 Fourth wheel and pinion 33 Center wheel and pinion 36 Main plate • Discrimination of the hand installation heights Cal. 7N Series watches have numerals printed on the dial and the movement to indicate the hand installation heights.
  • Page 4 The battery connection (+) we are supplying has no calibre number nor numeral printed on it for discriminating the hand installation height. Winding stem 0351 892 The type of winding stem is determined based on the design of cases. Check the case number and refer to “SEIKO Casing Parts Catalogue” to choose a corresponding winding stem.
  • Page 5 TECHNICAL GUIDE Cal. 7N32C, 7N33C, 7N39C • The explanation here is only for the particular points of Cal. 7N32C, 7N33C and 7N39C. • For the repairing, checking and measuring procedures, refer to the “TECHNICAL GUIDE, GENERAL INSTRUCTIONS”. STRUCTURE OF THE CIRCUIT BLOCK...
  • Page 6 TECHNICAL GUIDE Cal. 7N32C, 7N33C, 7N39C Intermediate wheel for day correction (only for Cal. 7N33C) Dial side Set the intermediate wheel for day correction in the direction as shown in the illustration at right. Main plate side Date dial guard Unlike conventional movements, the date dial guard is not fixed with screws.
  • Page 7 TECHNICAL GUIDE Cal. 7N32C, 7N33C, 7N39C Battery • How to install Insert the battery aslant from the direction shown by the arrow. Battery connection (+) screw Fasten the screw on the crystal unit side while holding down the edge of the crystal unit.
  • Page 8 Take care not to deform the spring portion of the yoke. Winding stem The first intermediate wheel for calendar correction (Cal. 7N33C) or the date corrector wheel (Cal. 7N32C and 7N39C) has some elasticity in the contact with the winding stem so that it can be easily fixed.

This manual is also suitable for:

7n33c7n39c

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