TECHNICAL GUIDE
Cal. 6T63A
10/19
●
How to find the correct parts, if not determined by 4 digit caliber number
Following parts are determined based on the design of watches, such as hands height, dial
color, and design of cases. Please refer to the SEIKO WATCH PARTS CATALOGUE in order to
choose corresponding parts.
3
DATE DIAL 0878***
59
WINDING STEM 0351177
* For screw down crown models, the stem is assembled to the crown and is not available
separatelly
7
SMALL HOUR HAND WHEEL
8
HOUR WHEEL
16
SWITHCH SPRING
22
SECOND COUNTING WHEEL
24
MINUTE COUNTING WHEEL
49
CENTER WHEEL AND PINION
56
SECOND WHEEL
Please refer to the following table in order to find the correct part number of each wheel
according to the hand installation height. The numeral 2 or 4 is printed on the DIAL.
7 SMALL
HOUR HAND
WHEEL
8 HOUR
WHEEL
16 SWITHCH
SPRING
22 SECOND
COUNTING
WHEEL
24 MINUTE
COUNTING
WHEEL
49 CENTER
WHEEL AND
PINION
56 SECOND
WHEEL
2
0157012 0273038 4250035 0888017 0740002 0221087 0240018
4
0157013 0273042 4250054 0888019 0740003 0221092 0240019
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