The Seiko 7770-5260 is a watch model based on the 7770 movement.
Parts List
| ESHN81SN00 | crystal |
| 25N49DE5 | crown - crown |
| 25N49DE5C | crown |
| 0H2300N01 | case back gasket |
| GI138 | others - other band |
| DZ0040B01 | others - crown and stem gasket |
| 11S05DGH | others - hour hand |