Seiko 6138-505613, Transmission wheel
- NOS SEIKO original part in factory sealed packaging.
- Seiko part number: 505613
- Fits: 6138 A/B, 6139 A/B
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.