The Seiko Y621-8040 is a watch model based on the Y621 movement.
Parts List
| 200P02LN03 | crystal - crystal(case back) |
| 290A13LN03 | crystal - crystal |
| 45MA9NK1 | crown |
| WF85AB | band - band |
| 3BA135F1BNS | others - second hand |
| 82702930 | others - case ring |
| Y621804079A | others - case |
| Y6218040 | others - case back |
| A180BS | others - push pin |
| 1FE080LABFS | others - hour hand |
| 2FE120LABFS | others - minute hand |
Other models with the same movement
| Y621-6000 |
| Y621-6010 |
| Y621-6020 |
| Y621-6030 |
| Y621-6040 |
| Y621-6050 |
| Y621-6060 |
| Y621-8000 |
| Y621-8010 |
| Y621-8020 |
| Y621-8030 |