The Seiko W620-4160 is a watch model based on the W620 movement.
Parts List
| K00P05L20C | crystal - crystal (inorganic) |
| K00P05L20A | crystal - crystal (inorganic) |
| K00P05L20B | crystal - crystal (inorganic) |
| 0F270BAA1 | case back gasket - case back gasket |
| 86640155 | crystal gasket - plastic gasket for crystal |
| 80631959 | pusher - button |
| 80631951 | pusher - button |
| 80633755 | pusher - front button |
| 80633750 | pusher - front button |
| 6022KZ | band |
| 6020JZ | band |
| 6021JZ | band |
| 83200273 | others - button spring clip |
| AD006BA11 | others - crown and stem gasket |