The Seiko 7431-5200 is a watch model based on the 7431 movement.
Parts List
| RE8N83JN00 | crystal |
| 30N39NA1 | crown |
| 30N39NS1 | crown |
| 0H2400B01 | case back gasket - case back gasket |
| DZ0065B01 | case back gasket - button gasket |
Caliber 7431
Seiko 7431-5200 Watch Guide