The Seiko 2P21-0170 is a watch model based on the 2P21 movement.
Parts List
| 190P05HN03 | crystal |
| 190W99HN01 | crystal |
| 30M77NA1 | crown |
| 0F150BAA1 | case back gasket - case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| 86564110 | crystal gasket - plastic gasket for crystal |
| 86583630 | bezel gasket |
| HA16A | band - metal band |
| 1BC050A1BAA | others - hour hand |
| 1BC045A1BAA | others - hour hand |
| 3BA125F1BNG | others - second hand |
| A110BS | others - push pin (for mb) |
| 2P21017098 | others - case |
| 2P210570XS19 | others - dial |
| 2P219 | others - machine code |
| 82340371 | others - bezel |
| 82820130 | others - case ring |
| 06T09CGH | others - hour hand |
| 0351236 | others - winding stem |
| 06T09CGM | others - minute hand |
| 08SC29NG | others - second hand |
| 2BC065A1BCA | others - minute hand |
Caliber 2P21
