The Seiko 1221-5450 is a watch model based on the 1221 movement.
Parts List
| ESSN09JN00 | crystal - crystal (inorganic) |
| 30N63NA1 | crown - crown |
| 0H1700B01 | case back gasket - bezel gasket |
| PK17A | band - leather band |
| PK47A | band - leather band |
| 3BA075F1BNG | others - second hand |
| 07SC25NG | others - second hand |
| 1AA047A1BNG | others - hour hand |
| 07P03NGH | others - hour hand |
| 07P03NGM | others - minute hand |
| 2AA067A1BNG | others - minute hand |
| 12210680XB14 | others - dial |
| 12210680XG14 | others - dial |
| 12210960XB14 | others - dial |
| 122110 | others - machine code |
| 1221545025 | others - case |
| 82711470 | others - case ring |
| A110AS | others - push pin |
| 0351117 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1221
