The Seiko 4N21-036A is a watch model based on the 4N21 movement.
Parts List
| 170A02SN02 | crystal - crystal (sapphire) |
| 6M30A3NNG1 | crown - crown |
| 0F150BAA5 | case back gasket - case back gasket |
| DAD0BW | band - leather band |
| 3BA075F1BNG | others - second hand |
| A100BS | others - push pin (for mb) |
| 4N21036A | others - case back |
| 4N21036A7H | others - case |
| 4N210740XS14 | others - dial |
| 4N2164 | others - machine code |
| 82841070 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 07TG6NGH | others - hour hand |
| 07TG6NGM | others - minute hand |