The Seiko W620-4470 is a watch model based on the W620 movement.
Parts List
| SA0P49L20A | crystal - crystal |
| SA0P49L20B | crystal - crystal |
| 0F300BAD1 | case back gasket - case back gasket |
| 86640850 | crystal gasket - plastic gasket for crystal |
| HB0Z01PMS0 | pusher - button |
| HB0Z01PMG0 | pusher - button |
| HB1Z01PMS0 | pusher - button |
| HB1Z01PMG0 | pusher - button |
| 7BS7WB | band - band |
| 7C41WB | band - band |
| 7C40WB | band - band |
| 7C46WB | band - band |
| 7BS7YB | band - band |
| W6204470N2F | others - case |
| 86510759 | others - conducting plate |
| 86510819 | others - conducting plate |
| T160BS | others - push pin |
| W62030 | others - machine code |
| W62050 | others - machine code |
| W6204470N2E | others - case |
| W6204470N2A | others - case |
| W6204470N2B | others - case |
| W6204470N2C | others - case |
| W6204470N2D | others - case |
| AD006BA11 | others - crown and stem gasket |
| 83200219 | others - button spring clip |
| 81350760 | others - button spring (front) |
| 81518099 | others - case back screw |
| 81351639 | others - button spring |