The Seiko 2P21-0040 is a watch model based on the 2P21 movement.
Parts List
| 180W27HN01 | crystal |
| 38E03NA1 | crown |
| 0F160BAA1 | case back gasket |
| 86580910 | crystal gasket - plastic gasket for crystal |
| B5380C | band - metal band |
| B5380C-LKG | band - link |
| B5380G | band - metal band |
| B5380G-LKG | band - link |
| B5380G-PB1 | clasp - parts for buckle/clasp |
| B5380G-BK2G | clasp - clasp |
| B5380C-PB1 | clasp - parts for buckle/clasp |
| B5380C-BK2S | clasp - clasp |
| 2BE070LBBDG | others - minute hand |
| 3BA075F1BNG | others - second hand |
| 1BE050LABDG | others - hour hand |
| 07SC43NG | others - second hand |
| EB0055B0A | others - crown and stem gasket |
| 81606439 | others - bracelet fixing pin |
| 81604779 | others - bracelet fixing pin |
| 81181919 | others - bracelet fixing pipe |
| 2P210040 | others - case back |
| 2P21004075 | others - case |
| 2P210040SA | others - case |
| 2P210210XG14 | others - dial |
| 2P210210XS14 | others - dial |
| 2P219 | others - machine code |
| 82733490 | others - case ring |
| 06T01DGM | others - minute hand |
| 06T01DGH | others - hour hand |
Caliber 2P21
