Seiko 6138, 6139-310.611, Balance, complete
Tax included.
- SEIKO original balance in very good used condition.
- Seiko part number: 310-611
- Fits calibers:
- 6102A, 6105A, 6105B, 6106A, 6106B, 6106C, 6109A, 6110A, 6117A, 6117B, 6118A, 6119A, 6119B, 6119C, 6133A, 6138A, 6138B, 6139A, 6139B
Technical data: SEIKO 6138A
- 21 jewels, automatic wind, chronograph, 60 s, 30 min, 12 h counter, day-date.
- S: = 27.0 mm.
- H: = 8.0 mm.
- N: = 21.600 A/h.
- Power reserve: 45 h.
Versions:
- 6138A:
- 6138B: modified switch mechanism.
- 6139A: without 12 h counter.
- 6139B: without 12 h counter, modified switch mechanism.