The Seiko 3421-5250 is a watch model based on the 3421 movement.
Parts List
| ES1W74GN00 | crystal |
| 30M22NA1 | crown - crown |
| 30M22NS1 | crown - crown |
| 0H1860N01 | case back gasket - case back gasket |
Caliber 3421
Seiko 3421-5250 Watch Guide
The Seiko 3421-5250 is a watch model based on the 3421 movement.
| ES1W74GN00 | crystal |
| 30M22NA1 | crown - crown |
| 30M22NS1 | crown - crown |
| 0H1860N01 | case back gasket - case back gasket |