The Seiko 7123-503A is a watch model based on the 7123 movement.
Parts List
| SA1W87HN00 | crystal |
| 40M99NS1 | crown |
| 40M99NA1 | crown |
| DB0055B01 | case back gasket - crown and stem gasket |
Caliber 7123
Seiko 7123-503A Watch Guide
The Seiko 7123-503A is a watch model based on the 7123 movement.
| SA1W87HN00 | crystal |
| 40M99NS1 | crown |
| 40M99NA1 | crown |
| DB0055B01 | case back gasket - crown and stem gasket |