The Seiko 2P21-0B80 is a watch model based on the 2P21 movement.
Parts List
| 170W06JN01 | crystal |
| 30MA2NA1 | crown - crown |
| EZ0035B0 | case back gasket |
| 0A1700N0 | case back gasket |
| B5452C | band - metal band |
| B5452C-LKG | band - link |
| B5452D | band - metal band |
| B5452D-LKG | band - link |
| B5452G | band - metal band |
| B5452G-LKG | band - link |
| B5452G-BK4G | clasp - clasp |
| B5452D-BK4G | clasp - clasp |
| B5452C-BK4G | clasp - clasp |
| 07SC02NG | others - second hand |
| EZ0035B0A | others - crown and stem gasket |
| 0351236 | others - winding stem |
| 2P210B80 | others - case back |
| 2P210B8075 | others - case |
| 2P210B8098 | others - case |
| 2P210B80XF | others - case |
| 2P210H00XG14 | others - dial |
| 2P210H00XN14 | others - dial |
| 2P210H10XN14 | others - dial |
| 2P219 | others - machine code |
| 82811580 | others - case ring |
| A100AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 07T04NGM | others - minute hand |
| 07T04NGH | others - hour hand |
Caliber 2P21
