The Seiko 1221-501A is a watch model based on the 1221 movement.
Parts List
| ESDN73SN00 | crystal - crystal (sapphire) |
| 30N59DA6 | crown - crown |
| 0H1600B01 | case back gasket - case back gasket |
| ML01B | band - leather band |
| 07P57DGH | hand - hour hand |
| 07P57DGM | hand - minute hand |
| 08SC35VG | hand - second hand |
| 122110 | others - machine code |
| 12211500XG14 | others - dial |
| 1221501A | others - case back |
| 1221501A25A | others - case |
| 1221501A25B | others - case |
| 1221501A25C | others - case |
| 1221501A25D | others - case |
| 83131750 | others - case ring |
| A110AS | others - push pin |
| 0351117 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1221
