The Seiko 2P21-0150 is a watch model based on the 2P21 movement.
Parts List
| 170W15LN01 | crystal |
| 30M67NN1 | crown |
| FE178BA12 | case back gasket |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| ZGA10G | band - leather band |
| ZGJ15G | band - leather band |
| 3BA075F1BNG | others - second hand |
| 1BC045A1BAA | others - hour hand |
| 07SC25NG | others - second hand |
| 07SC43NG | others - second hand |
| 2P2101507S | others - case |
| 2P210534XG14 | others - dial |
| 2P210544XS19 | others - dial |
| 2P219 | others - machine code |
| 06T09CGM | others - minute hand |
| 07T07DGM | others - minute hand |
| 1BA047A1BNG | others - hour hand |
| 2BA070A1BDG | others - minute hand |
| 2BC065A1BCA | others - minute hand |
Caliber 2P21
