The Seiko 2P21-0090 is a watch model based on the 2P21 movement.
Parts List
| 205P07SN02 | crystal |
| 205W29SN01 | crystal |
| 30M57NA1 | crown - crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0F160BAA2 | case back gasket |
| 86582710 | crystal gasket |
| DK36C | band - leather band |
| 3BA125F1BNG | others - second hand |
| 0351236 | others - winding stem |
| 82810390 | others - case ring |
| 2P21009075 | others - case |
| 2P210330XS14 | others - dial |
| 2P219 | others - machine code |
| A120AS | others - push pin |
| 08T09CGH | others - hour hand |
| 08T09CGM | others - minute hand |
| 08SC29NG | others - second hand |
| 1BC055A1BAA | others - hour hand |
| 2BC080A1BCA | others - minute hand |
Caliber 2P21
