The Seiko S800-0020 is a watch model based on the S800 movement.
Parts List
| 290P37HN03 | crystal |
| 0H338BAA1 | case back gasket |
| EB0075B0A | case back gasket - button gasket |
| 86587235 | crystal gasket - plastic gasket for crystal |
| 80636978 | pusher |
| DAH5DB | band - other band |
| S8000020 | others - case back |
| S800002061A | others - case |
| S80010 | others - machine code |
| 81404059 | others - washer |
| C200FS | others - push pin |
| 81350460 | others - button spring |
| 83200271 | others - button spring clip |
Other models with the same movement
| S800-0010 |
| S800-0019 |