The Seiko 2P21-5A00 is a watch model based on the 2P21 movement.
Parts List
| RE8N44JN01 | crystal |
| RE8N44JN | crystal |
| 30M98NA1 | crown |
| 0H1860N01 | case back gasket - case back gasket |
| 0H1860N0 | case back gasket |
| DZ0041B0 | case back gasket |
| GJA03G | band - leather band |
| GJA04G | band - leather band |
| GJJ03G | band - leather band |
| GJJ04G | band - leather band |
| WJJ13G | band - leather band |
| 06T26NGH | hand - hour hand |
| 06T26NGM | hand - minute hand |
| 07SC02NG | others - second hand |
| A130AS | others - push pin (for lb) |
| 0351236 | others - winding stem |
| 2P210A10XB14 | others - dial |
| 2P210A10XG14 | others - dial |
| 2P215A0025 | others - case |
| 2P219 | others - machine code |
| 82801040 | others - case ring |
| DZ0041B01 | others - crown and stem gasket |
Caliber 2P21
