The Seiko W621-4040 is a watch model based on the W621 movement.
Parts List
| 0G300BA11 | case back gasket - case back gasket |
| EC39AB | band - band |
| EC40AB | band - band |
| W62153 | others - machine code |
| AD006BAD1 | others - crown and stem gasket |
| 81621219 | others - bracelet fixing pin |
| W621404002Z | others - case |
| 81180169 | others - bracelet fixing pipe |
| W621404001Z | others - case |
Other models with the same movement
| W621-4000 |
| W621-4020 |
| W621-4A00 |
| W621-4A10 |
| W621-4A20 |
| W621-4A30 |