The Seiko V657-9920 is a watch model based on the V657 movement.
Parts List
| 300A19J20A | crystal - crystal |
| 45E41NA1 | crown - crown |
| FE318BA12 | case back gasket - case back gasket |
| AD006BAA1 | pusher - button gasket |
| 80631958 | pusher - button |
| 4991CZ | band - band |
| 4991LZ | band - band |
| 4991CZ-LK4 | band - link |
| 4991LZ-LK4 | band - link |
| 4991CZ-PB1 | clasp - parts for buckle |
| 4991CZ-BKH | clasp - buckle |
| 4991LZ-BKH | clasp - buckle |
| 4991LZ-PB1 | clasp - parts for buckle |
| 3BA032FMBNG | others - small hand (9h) |
| 1AB080L2BTG | others - hour hand |
| 2BB125LABTG | others - minute hand |
| 83200273 | others - button spring clip |
| AD006BA11 | others - crown and stem gasket |
| 0351892 | others - winding stem |
| V6579920WFA | others - case |
| V6579920 | others - case back |
| V6579920WFB | others - case |
| 0878220 | others - date dial |
| 4991CZ-EP4 | others - endpiece |
| 4991LZ-EP4 | others - endpiece |
| A180BS | others - push pin |
| V65720 | others - machine code |
| V6579168XB24 | others - dial |
| V6579170XS14 | others - dial |
| V6579178XS14 | others - dial |
| 3AX125F3ASG | others - second hand |