The Seiko W620-4490 is a watch model based on the W620 movement.
Parts List
| ES0P61L30A | crystal - crystal |
| ES0P61L30B | crystal - crystal |
| ES0P61L30C | crystal - crystal |
| ES0P61L30D | crystal - crystal |
| 0F270BAA1 | case back gasket - case back gasket |
| 86640730 | crystal gasket - plastic gasket for crystal |
| A35A05SMN0 | pusher - button (2h) |
| A35A05SMS0 | pusher - button(3h) |
| 80711655 | pusher - front button |
| 71E6WZ | band - band |
| 71E6ZZ | band - band |
| 71E7ZZ | band - band |
| 71E6WZ-LK4 | band - link |
| 71E6ZZ-LK2 | band - link |
| 71E7ZZ-LK2 | band - link |
| 71E6ZZ-PB1 | clasp - parts for buckle |
| 71E7ZZ-PB1 | clasp - parts for buckle |
| 71E6WZ-PB1 | clasp - parts for buckle |
| 71E6WZ-BKJ | clasp - buckle |
| 71E6ZZ-BKB | clasp - buckle |
| 71E7ZZ-BKB | clasp - buckle |
| 82836970 | others - case ring |
| W620449079A | others - case |
| 81350760 | others - button spring (front) |
| 81351639 | others - button spring |
| 83200273 | others - button spring clip |
| AD006BA11 | others - crown and stem gasket |
| 71E6WZ-EP4 | others - endpiece |
| W620449079C | others - case |
| W6204490WEA | others - case |
| W620449079B | others - case |
| A150BS | others - push pin |
| W62050 | others - machine code |
| W62051 | others - machine code |
| W62052 | others - machine code |