The Seiko W190-4A20 is a watch model based on the W190 movement.
Parts List
| FH2780B0A | case back gasket - case back gasket |
| F1G9JG | band - band |
| FF53JB | band - band |
| W1904A2001 | others - case |
| W1904A2002 | others - case |
| S140BS | others - push pin |
Other models with the same movement
| W190-4A00 |