The Seiko W850-4050 is a watch model based on the W850 movement.
Parts List
| ES0P69L30A | crystal - crystal (inorganic) |
| 0F309BEA1 | case back gasket - case back gasket |
| 86640970 | crystal gasket - plastic gasket for crystal |
| HB3Z01PAS1 | pusher - front button |
| 7C94WB | band - band |
| 7C95WB | band - band |
| 7C99WB | band - band |
| 7CA0WB | band - band |
| 86510959 | others - conducting plate |
| 86511079 | others - conducting plate |
| T120BS | others - push pin |
| T140BS | others - push pin |
| T190BS | others - push pin |
| W85053 | others - machine code |
| AD006BA11 | others - crown and stem gasket |
| 83200219 | others - button spring clip |
| 81351999 | others - button spring |
| 81514639 | others - case back screw |
| W8504050SLA | others - case |
| W8504050SLB | others - case |
| W8504050SLC | others - case |
| W8504050SLD | others - case |
Other models with the same movement