The Seiko 8523-5140 is a watch model based on the 8523 movement.
Parts List
| ESGN69JN00 | crystal |
| 35NK5NA1 | crown |
| 35NK5NS1 | crown |
| 0H2200B01 | case back gasket - rotating bezel gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
Caliber 8523
Seiko 8523-5140 Watch Guide