The Seiko W650-4180 is a watch model based on the W650 movement.
Parts List
| K00P15L30A | crystal - crystal |
| K00P15L30B | crystal - crystal |
| 0F300BED1 | case back gasket - case back gasket |
| 86640250 | crystal gasket - plastic gasket for crystal |
| 80710270 | pusher - button |
| 80710274 | pusher - button |
| 80710275 | pusher - button |
| 7BY2WB | band - band |
| 7BY3WB | band - band |
| 7BZ4WB | band - band |
| W6504180N2A | others - case |
| W6504180N2B | others - case |
| W6504180N2C | others - case |
| 86510819 | others - conducting plate |
| 86510839 | others - conducting plate |
| T160BS | others - push pin |
| W65050 | others - machine code |
| W65051 | others - machine code |
| W65053 | others - machine code |
| AD006BA11 | others - crown and stem gasket |
| 81350760 | others - button spring (front) |
| 81518099 | others - case back screw |
| 81351639 | others - button spring |
| 83200211 | others - button spring clip |