Seiko 7C17B Technical Manual

PARTS CATALOGUE/TECHNICAL GUIDE

Cal. 7C17B

(×1.0)

Movement

Cal.No.

Movement size

(mm)

Outside diameter

Casing diameter

5.2 mm

2 hands

φ28.6 mm×27.0 mm between 3 o'clock and 9 o'clock sides

φ27.0 mm×25.4 mm between 3 o'clock and 9 o'clock sides

Time indication

Step motor (Load compensated driving pulse type)

Driving system

Electronic circuit reset switch

Additional mechanism

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

Pattern cutting systemRegulation system

Use 10-second gate.Measuring gate by quartz tester

SEIKO SR43SW,Maxell SR43SW, U.C.C. 301, SONY EVEREADY 301 Battery type

Pressure 1.55V

approximately 5 yearsBattery life

7 jewels

Jewels

Battery

1/6

Height

[SPECIFICATIONS]

7C17B

Disassembling procedures Figs.

Moebius A
SEIKO Watch Oil S-6

Normal Quantity

0022 493

Coil block screw
Antimagnetic shield plate
screw

0022 648

Battery clamp screw

1Case back

7Movement

8Bezel gasket

9Case (with bezel)

6Winding stem

(with crown)

2Case back gasket

4Casing clamp screw (2 pcs.)

0022 421

18

Minute wheel
0261 935

17

Setting wheel
2081 925

15

Dial sheet
0105 925

16

Hour wheel
0271 927

14

Dial sheet screw
(3 pcs.)
0022 257

13

Dial washer
0491 706

11Dial

10Hour and minute

PARTS CATALOGUE

12

Holding ring for dial

→Please see the remarks on the following pages.

5Casing clamp (2 pcs.)

0399 601

0022 421

Casing clamp screw

0022 257

Dial sheet screw

2/6

144

Lubricating: Types of Oil Oil quantity

Reassembling procedures Figs.

44

1

44

0866 544

hands

Train wheel bridge screw

Contact point spring

3

4281 514

Cal. 7C17B

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