The Seiko 2P21-5B70 is a watch model based on the 2P21 movement.
Parts List
| ESHN02JH | crystal |
| ESHN02JH01 | crystal |
| 30M98NA1 | crown |
| 0H1860N01 | case back gasket - case back gasket |
| 0H1860N0 | case back gasket |
| DZ0041B0 | case back gasket |
| G5082C | band - metal band |
| G5082G | band - metal band |
| G5083G | band - metal band |
| G5083G-BK5G | clasp - clasp |
| G5082G-BK5G | clasp - clasp |
| G5082C-BK5S | clasp - clasp |
| 06T30ZGH | hand - hour hand |
| 06T30ZGM | hand - minute hand |
| 06T48DGH | hand - hour hand |
| 07SC02NG | others - second hand |
| 2P210D80XG14 | others - dial |
| 2P210D90XG14 | others - dial |
| 2P210E00X994 | others - dial |
| 2P210E10X995 | others - dial |
| 2P215B70 | others - case back |
| 2P215B7025 | others - case |
| 2P215B70EA | others - case |
| 2P219 | others - machine code |
| 82801040 | others - case ring |
| A120AS | others - push pin |
| 0351236 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 06T48DGM | others - minute hand |
| 2BE055L0BDG | others - minute hand |
| 05T18DGM | others - minute hand |
| 1BE035L0BDG | others - hour hand |
| 05T18DGH | others - hour hand |
Caliber 2P21
