The Seiko 2J81-5020 is a watch model based on the 2J81 movement.
Parts List
| K02A11S30A | crystal - crystal (sapphire) |
| 6M25A3STS0 | crown - crown |
| 0F150NA1S | case back gasket - case back gasket |
| A061AB | band - band |
| 1BH045AABJS | others - hour hand |
| 3DA060AABHS | others - sub hand |
| 2BH062AABJS | others - minute hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 0351400 | others - winding stem |
| 81607559 | others - bracelet fixing pin |
| 82839490 | others - case ring |
| 2J81502061A | others - case |
| 2J815020 | others - case back |
| DB004BAD1 | others - crown and stem gasket |
| K02A11S30A | crystal - crystal (sapphire) |
| 6M25A3STS0 | crown - crown |
| 0F150NA1S | case back gasket - case back gasket |
| A061AB | band - band |
| 1BH045AABJS | others - hour hand |
| 3DA060AABHS | others - sub hand |
| 2BH062AABJS | others - minute hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 0351400 | others - winding stem |
| 81607559 | others - bracelet fixing pin |
| 82839490 | others - case ring |
| 2J81502061A | others - case |
| 2J815020 | others - case back |
| DB004BAD1 | others - crown and stem gasket |
Other models with the same movement