The Seiko 8Y21-5071 is a watch model based on the 8Y21 movement.
Parts List
| SAHN11JN01 | crystal - crystal |
| 35NJ7NN1 | crown |
| 0H2700B01 | case back gasket - case back gasket |
| B1691K | band |
| 3BA125F1BNG | others - second hand |
| 10P53NGH | others - hour hand |
| 2AA090A1BNG | others - minute hand |
| 82833610 | others - case ring |
| 8Y210191XG14 | others - dial |
| 8Y210311XG14 | others - dial |
| 8Y21507125 | others - case |
| 8Y2183 | others - machine code |
| A160BS | others - push pin |
| 09P27DGM | others - minute hand |
| 1AE057LABDG | others - hour hand |
Caliber 8Y21
