The Seiko 7770-5250 is a watch model based on the 7770 movement.
Parts List
| ET6N03SN01 | crystal |
| 25N01DZ5C | crown |
| 25N01DZ5 | crown |
| 0D270NAA1 | case back gasket |
| LK11P | band - leather band |
| A180AS | others - push pin |
| 10S71VGH | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 10S71VGM | others - minute hand |