The Seiko 4J81-0A90 is a watch model based on the 4J81 movement.
Parts List
| 170A25S30A | crystal |
| 170A25S40A | crystal - crystal (sapphire) |
| 6M25Z7SNWA | crown |
| 0F160BAD2 | case back gasket - case back gasket |
| A067DB | band - band |
| A067CB | band - band |
| 1BH045AABJG | others - hour hand |
| 2BH067AABJG | others - minute hand |
| 1BH045AABJJ | others - hour hand |
| 3DA065AABHG | others - second hand |
| 0351405 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 82835710 | others - case ring |
| 4J810A909T | others - case |
| 4J810A90 | others - case back |
| 4J810A909TA | others - case |
| 2BH067AABJJ | others - minute hand |
| 3DA065AABHJ | others - second hand |