The Seiko 2P21-5B00 is a watch model based on the 2P21 movement.
Parts List
| BA2N40JN01 | crystal |
| 30M98NA1 | crown |
| 0H1610N01 | case back gasket |
| Z5196G | band - metal band |
| Z5196G-BK5G | clasp - clasp |
| 07SC02NG | others - second hand |
| 0351236 | others - winding stem |
| 2P210B70XN14 | others - dial |
| 2P215B0025 | others - case |
| 2P219 | others - machine code |
| 82802280 | others - case ring |
| A100AS | others - push pin |
| 05T06NGH | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
| 05T24NAM | others - minute hand |
Caliber 2P21
