The Seiko 4J81-5040 is a watch model based on the 4J81 movement.
Parts List
| ES5N01SN00 | crystal - crystal |
| 27N01NS5 | crown - crown |
| 0F170NA1S | case back gasket - case back gasket |
| WI398 | band - band |
| 0351405 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |