The Seiko 7750-507H is a watch model based on the 7750 movement.
Parts List
| BA2N93SE40 | crystal |
| 25N07DA1 | crown |
| 25N07NS1 | crown |
| 0H2400B01 | case back gasket - case back gasket |
| DZ0040B01 | others - crown and stem gasket |
Caliber 7750
Seiko 7750-507H Watch Guide