The Seiko 4J51-0A20 is a watch model based on the 4J51 movement.
Parts List
| 200P06SZ01 | crystal - crystal (sapphire) |
| 6M35A0KAG1 | crown - crown |
| 0F180BAD2 | case back gasket - case back gasket |
| 86582440 | crystal gasket - plastic gasket for crystal |
| 86179080 | bezel gasket - plastic gasket for bezel |
| DD30BW | band - band |
| DEN9BW | band - band |
| 08ST06JG | others - second hand |
| 1AG055F0BXC | others - hour hand |
| 2AG080F0BXC | others - minute hand |
| 0351405 | others - winding stem |
| 81501645 | others - case back screw |
| EZ0035B0D | others - crown and stem gasket |
| 82871030 | others - case ring |
| A120AS | others - push pin |
| 4J510A2093 | others - case |
Other models with the same movement