The Seiko 7771-6020 is a watch model based on the 7771 movement.
Parts List
| 0F220BAA3 | case back gasket - case back gasket |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0F220NAA3 | bezel gasket |
| GK01P | band - leather band |
| GK02P | band - leather band |
| A170AS | others - push pin |
| 81505075 | others - case back screw |
| 81505076 | others - case back screw |