The Seiko YS31-4000 is a watch model based on the YS31 movement.
Parts List
0G1100N01 | case back gasket |
HL77D | band - leather band |
HL78D | band - leather band |
KL78B | band - leather band |
A100BS | others - push pin (for mb) |
Other models with the same movement
YS31-4010 |