The Seiko 8620-0020 is a watch model based on the 8620 movement.
Parts List
| 290N35LN00 | crystal |
| 35NG7NS1 | crown |
| 35NG7NA1 | crown |
| DZ0065B01 | case back gasket - button gasket |
| 0G2125B01 | case back gasket - case back gasket |
Caliber 8620
Seiko 8620-0020 Watch Guide