The Seiko 2P21-5080 is a watch model based on the 2P21 movement.
Parts List
| ET1N15JN01 | crystal |
| ET1N15JN | crystal |
| 30N63NA1 | crown - crown |
| 30ND3NA1 | crown - crown |
| 0G1700B0 | case back gasket |
| AC004BA1 | case back gasket |
| 0G1700B01 | case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| B5381G | band - metal band |
| B5381G-BK3G | clasp - clasp |
| 05T05DCH | hand - hour hand |
| 05T11DGM | hand - minute hand |
| 3BA075F1BNG | others - second hand |
| 06SC15NG | others - second hand |
| 82801910 | others - case ring |
| B090AS | others - push pin |
| 2P210140XB14 | others - dial |
| 2P215080 | others - case back |
| 2P21508025 | others - case |
| 2P219 | others - machine code |
Caliber 2P21
