Seiko 7T32B,7T42B Technical Manual

1

Cal. 7T32B
Cal. 7T42B

Outside diameter

(x 1.0)

[SPECIFICATIONS]

7T32B

7T42B

Cal. No.

Item

Movement

The illustrations refer to Cal. 7T32B.

ø27.6mm

24.0mm between 3 o’clock and 9 o’clock sides

ø27.0mm

24.0mm between 3 o’clock and 9 o’clock sides

Casing diameter

3.1mm (3.2mm including the battery portion)Height

Movement size

mralAhctawpotSemit niaMnoitacidni emiT

Timer (for Cal. 7T42B)

Hour, minute
and small
second hands

Minute and
1/5-second
hands

Small hour and
minute hands

Minute and second hands
(Stopwatch 1/5-second
and minute hands)

Driving system Step motor, 4 pieces

• Electronic circuit reset switch

• Train wheel setting device

• Battery life indicator (Small second hand moves at two-second intervals.)

• Date calendar

• Instant setting device for date calendar

• Stopwatch function (Up to 30 minutes in 1/5 seconds)

• Accumulated elapsed time measurement

• Split time measurement

• Timer function (Up to 60 minutes in minutes)

• Alarm function (12-hour indication system)

• Alarm test system

Additional mechanism

Monthly rate at normal temperature range: less than 15 secondsLoss/gain

NilRegulation system

Measuring gate by quartz tester

SEIKO SR927W, Maxell SR927W, SONY SR927W, EVEREADY 399
Battery life is approximately 2 years.
Voltage: 1.55V

Battery

0 jewelJewels

PARTS CATALOGUE / TECHNICAL GUIDE

Use 10-second gate.

2

Cal. 7T32B

1 → 79

79 → 1

7

8

6

5

4589 801

3

18

Parts Catalogue

9

10

2

1

4

11

12

13

14

15

16

17

19

Case back

Case back gasket

Case ring (Cal. 7T32B)

Piezoelectric element

Button spring clip

Button C

Button B

Winding stem for alarm

Button spring

Button A

Winding stem

Stopwatch second

hand/Timer minute

hand

Minute hand

Hour hand

Small second hand

Stopwatch minute

hand/Timer

hand

second

Alarm minute hand

Alarm hour hand

Dial

Holding ring for dial

Silicone Oil 500,000 c.s.

Please see the remarks on the following pages.

SEIKO Watch Oil S-6

Extremely small

MoebiusA

Normalquantity

Lubricating:Typesofoil

Oilquantity

DisassemblingproceduresFigs.:

ReassemblingproceduresFigs.:

3

Cal. 7T32B

Please see the remarks on the following pages.

Battery clamp screw

　0022 230

Parts Catalogue

22
0878 527

21
0808 580

20
0027 973

27
0271 580 (1)
0271 588 (2)

26
0271 583

25
0802 580

24

0737 580

23
0962 580

28
0022 230

29
4225 714

31
0022 459

33
0396 580

34
4000 710

30 Battery

32
4457 726

37 Pin for train wheel bridge
0027 974

38
0125 590

39 Second-counting wheel
0888 580 (1)
0888 582 (2)

49 Intermediate minute-
counting wheel 0950 590

Circuit block cover
screw

　0022 459

51 Intermediate alarm wheel
0950 590

50 Minute-counting
wheel　0902 580

52 enter minute wheel
for alarm　0270 580

53 Minute wheel for alarm
0261 582

54 Setting wheel for alarm
0281 582

48 Setting wheel　0281 580

47 Minute wheel　0261 580

46 Second intermediate wheel

0885 591

45 First intermediate wheel

0885 590

44 Fifth wheel and pinion
　0701 580

43 Third wheel and pinion　
0231 580

42 Fourth wheel and pinion
0241 583

41 　Small second wheel
0240 580

40 Spacer for center wheeland

35
4246 700

36

Battery connection (–)

4270 710

Pin for date dial guard

Date dial guard

Date dial

Intermediate wheel
for calendar correction

Date corrector setting
wheel

Date driving wheel

Hour wheel for alarm

Hour wheel

Battery clamp screw

Battery clamp

Circuit block cover screw

Circuit block cover

Friction spring for
second-counting

Circuit block

Buzzer lead terminal

Train wheel bridge

pinion

4283 581

for second-counting

for second-counting

4

Cal. 7T32B

部品カタログ

55 Step rotor　4146 710

56 Chronograph rotor for second

　4146 710

57 Alarm rotor 4146 710

58 Chronograph rotor for minute

　4146 710

59 Coil block　4002 700

60 Coil block for chronograph

second

4002 700

61 Coil block for alarm
4002 711

62 Coil block for chronograph

minute

4002 711

63 Switch lever A
4450 710

64 Setting lever for alarm
0383 591

65 Setting lever
0383 592

66 Winding stem for alarm
0351 580

67 Clutch wheel for alarm
0282 582

68 Yoke
0384 580

69 Winding stem
0351 580

70 Clutch wheel
0282 580

71 Train wheel setting lever
0391 591

72 Rotor stator
4239 710

73 Rotor stator for chronograph second
4239 711

74 Rotor stator for alarm
4239 712

75 Rotor stator for chronograph minute
4239 713

76 Center wheel and pinion
0221 580 (1)
0221 583 (2)

77 Switch lever C
4450 702

78 Switch lever B
4450 701

79 Main plate
0100 590

Please see the remarks on the following pages.