The Seiko 8Y21-5029 is a watch model based on the 8Y21 movement.
Parts List
| BA6N87JN01 | crystal |
| 290W64LN01 | crystal |
| 35M75NN1 | crown |
| DH0115B01 | case back gasket - crown and stem gasket |
| 0G2070B01 | case back gasket |
| 0D205BA11 | case back gasket |
| Z5322G | band |
| B5564G | band |
| Z5322G-BK5G | clasp - clasp |
| 3BA075F1BNG | others - second hand |
| A120BS | others - push pin (for lb) |
| 82739370 | others - case ring |
| 8Y210050XG14 | others - dial |
| 8Y215029 | others - case back |
| 8Y21502925 | others - case |
| 8Y2183 | others - machine code |
| 06SC11NG | others - second hand |
| 0351112 | others - winding stem |
| 06P21NGM | others - minute hand |
| 06P21NGH | others - hour hand |
Caliber 8Y21
