The Seiko 8J81-5020 is a watch model based on the 8J81 movement.
Parts List
| SA1A59S20A | crystal - crystal |
| 25M45NS4 | crown - crown |
| 0F240NA1S | case back gasket - case back gasket |
| 0F280BA1S | case back gasket - case back gasket |
| 0H2600B01 | case back gasket - case back gasket |
| AA37AB | band - band |
| 3DA090A0BHG | others - second hand |
| 1BB060YABHG | others - hour hand |
| 2BB090YBBHG | others - minute hand |
| 3DA090AAAHG | others - second hand |
| 0351405 | others - winding stem |
| 82871450 | others - case ring |
| 8J815020 | others - case back |
| A180AS | others - push pin |
| 8J81502061A | others - case |
| 82290679 | others - bezel |
| DZ0040B01 | others - crown and stem gasket |