The Seiko 2P21-5D20 is a watch model based on the 2P21 movement.
Parts List
| SAFN28SN01 | crystal |
| 30M98NA1 | crown |
| 0H1720N01 | case back gasket - case back gasket |
| 81924961 | clasp - clasp |
| 81924969 | clasp - clasp |
| 06TA0NGH | others - hour hand |
| 06TA0NGM | others - minute hand |
| 07SC02NG | others - second hand |
| 0351236 | others - winding stem |
| 2P210J20XG14 | others - dial |
| 2P210J20XS14 | others - dial |
| 2P215D20 | others - case back |
| 2P215D2025 | others - case |
| 2P215D20EA | others - case |
| 2P219 | others - machine code |
| 82811020 | others - case ring |
| DZ0041B01 | others - crown and stem gasket |
Caliber 2P21
