The Seiko l221-4010 is a watch model based on the l221 movement.
Parts List
| ESOW63HE | crystal |
| ES0W63HE10 | crystal |
| ES0W63HE40 | crystal |
| ES0W63HE50 | crystal |
| DJ1830B34 | case back gasket |
| 86170941 | crystal gasket |
| 806-01691 | pusher |
| EG0060B01 | others - button gasket |