Seiko 2409A-401, Winding stem, no: 354243
- NOS SEIKO original winding stem.
- Thread: 0.90 mm.
- Fits cal: 2409, 2418, 2419, ABC
Technical data Seiko 2418
- 23 Jewels, automatic wind, date.
- Size: 24.0 mm.
- H: = 4.55 mm.
- N: = 28.800 A/h.
- Power reserve: --