The Seiko 4J80-0020 is a watch model based on the 4J80 movement.
Parts List
| 205A01SN01 | crystal - crystal (sapphire) |
| 6M35Y1KNWD | crown - crown |
| 6M35Y1KNWA | crown - crown |
| 0F170NA1S | case back gasket - case back gasket |
| AA94FW | band - band |
| 1BH060A1BJS | others - hour hand |
| 2BH085A1BHS | others - minute hand |
| 81505075 | others - case back screw |
| 0351406 | others - winding stem |
| 82834610 | others - case ring |
| 4J8000201EA | others - case |
| 4J8000201EB | others - case |
| DZ0040B01 | others - crown and stem gasket |