The Seiko W850-4040 is a watch model based on the W850 movement.
Parts List
| K00P29L30A | crystal - crystal |
| 0F280BAA1 | case back gasket - case back gasket |
| 86640910 | crystal gasket - plastic gasket for crystal |
| A35A05SMN0 | pusher - button (2h) |
| A35A05SMS0 | pusher - button(3h) |
| 80711055 | pusher - front button |
| 80711054 | pusher - front button |
| 71K7WZ-LK2 | band - link |
| 71K7ZZ-LK2 | band - link |
| 71K8ZZ-LK2 | band - link |
| 71K7WZ | band - band |
| 71K7ZZ | band - band |
| 71K8ZZ | band - band |
| 71K7WZ-BKJ | clasp - buckle |
| 71K7ZZ-BKB | clasp - buckle |
| 71K8ZZ-BKB | clasp - buckle |
| 71K8ZZ-PB1 | clasp - parts for buckle |
| 71K7ZZ-PB1 | clasp - parts for buckle |
| 71K7WZ-PB1 | clasp - parts for buckle |
| 71K7WZ-EP4 | others - endpiece |
| W8504040WEA | others - case |
| W850404079B | others - case |
| A140BS | others - push pin |
| W85050 | others - machine code |
| 82844130 | others - case ring |
| W850404079A | others - case |
| 81350760 | others - button spring (front) |
| 83200273 | others - button spring clip |
| 81351630 | others - button spring |
| AD006BAD1 | others - crown and stem gasket |
| AD006BA11 | others - crown and stem gasket |
Other models with the same movement