The Seiko 8Y21-0010 is a watch model based on the 8Y21 movement.
Parts List
| 160N83JM01 | crystal |
| 35M75NN1 | crown |
| DH0115B01 | case back gasket - crown and stem gasket |
| 0G1820B01 | case back gasket |
| B5525G | band |
| B5574G | band |
| B5525S | band |
| B5574G-BK3G | clasp - clasp |
| 2AG052LABNG | hand - minute hand |
| 1AG035LABNG | others - hour hand |
| 3BA075F1BNG | others - second hand |
| 1AE040LMBNG | others - hour hand |
| 2AE060LABNG | others - minute hand |
| 06SC15NG | others - second hand |
| 06SC11NG | others - second hand |
| 82739350 | others - case ring |
| 8Y210010 | others - case back |
| 8Y21001025A | others - case |
| 8Y21001029A | others - case |
| 8Y210270XB14 | others - dial |
| 8Y210270XG14 | others - dial |
| 8Y210270XG24 | others - dial |
| 8Y210280XB14 | others - dial |
| 8Y210280XG14 | others - dial |
| 8Y210280XN14 | others - dial |
| 8Y210350XB14 | others - dial |
| 8Y210350XG14 | others - dial |
| 8Y210350XG24 | others - dial |
| 8Y2183 | others - machine code |
| B090BS | others - push pin |
| 0351112 | others - winding stem |
| 05SC05NG | others - second hand |
| 07SC04NG | others - second hand |
| 1AF040LABNG | others - hour hand |
| 2AF060LABNG | others - minute hand |
| 06P51NGM | others - minute hand |
| 05P11NGM | others - minute hand |
| 06P47NGM | others - minute hand |
| 05P13NGM | others - minute hand |
| 06P07DGM | others - minute hand |
| 06P57NGM | others - minute hand |
| 06P51NGH | others - hour hand |
| 05P11NGH | others - hour hand |
| 06P47NGH | others - hour hand |
| 05P13NGH | others - hour hand |
| 06P07DGH | others - hour hand |
| 06P57NGH | others - hour hand |
Caliber 8Y21
