The Seiko 2P21-0D40 is a watch model based on the 2P21 movement.
Parts List
| 185W10SN01 | crystal - crystal |
| 30MA2EG1 | crown |
| 0A1700N01 | case back gasket - case back gasket |
| MK19D | band - leather band |
| 07SC02NS | others - second hand |
| 0351236 | others - winding stem |
| 2P210D40 | others - case back |
| 2P210D40RE | others - case |
| 2P210K50XS29 | others - dial |
| 2P219 | others - machine code |
| 82811580 | others - case ring |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 07T06ASH | others - hour hand |
| 07T16ASM | others - minute hand |
Caliber 2P21
