The Seiko 2P21-0050 is a watch model based on the 2P21 movement.
Parts List
| 170W11HM | crystal |
| 170W11HM01 | crystal |
| 32M29NA1 | crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0F135BAA1 | case back gasket |
| 0F135BAA | case back gasket |
| 8658 - 1115 | crystal gasket |
| 86581110 | crystal gasket |
| 86581115 | crystal gasket - plastic gasket for crystal |
| Z5197C | band - metal band |
| Z5197C-LKG | band - link |
| Z5197H | band - metal band |
| Z5197H-LKG | band - link |
| Z5197H-PB1 | clasp - parts for buckle/clasp |
| Z5197H-BK4G | clasp - clasp |
| Z5197C-PB1 | clasp - parts for buckle/clasp |
| Z5197C-BK4S | clasp - clasp |
| 1BC045A1BNG | others - hour hand |
| 07SC17NG | others - second hand |
| 07SC25NG | others - second hand |
| 3BA075F1BNG | others - second hand |
| 81606439 | others - bracelet fixing pin |
| 81181459 | others - bracelet fixing pipe |
| 81604779 | others - bracelet fixing pin |
| 2P21005079 | others - case |
| 2P210050WE | others - case |
| 2P210190XN14 | others - dial |
| 2P210200XB14 | others - dial |
| 2P210780XS19 | others - dial |
| 2P219 | others - machine code |
| 82802430 | others - case ring |
| 06T09DGM | others - minute hand |
| 07T07DGM | others - minute hand |
| 2BC065A1BDG | others - minute hand |
| 1BA047A1BNG | others - hour hand |
| 2BA070A1BDG | others - minute hand |
| 2BA070A1BNG | others - minute hand |
Caliber 2P21
