The Seiko YS31-4010 is a watch model based on the YS31 movement.
Parts List
| 100N50GM01 | crystal |
| 100N50GM05 | crystal - crystal (inorganic) |
| 100N50GM02 | crystal |
| 100N50GM03 | crystal |
| 100N50GM04 | crystal |
| 0G1000N01 | case back gasket |
| 80615261 | pusher |
| HZ71A | band - metal band |
| KZ94A | band - metal band |
| KZ95A | band - metal band |
| KZ91B | band - metal band |
| KZ93A | band - metal band |
| 100N50GM01 | crystal |
| 100N50GM05 | crystal - crystal (inorganic) |
| 100N50GM02 | crystal |
| 100N50GM03 | crystal |
| 100N50GM04 | crystal |
| 0G1000N01 | case back gasket |
| 80615261 | pusher |
| HZ71A | band - metal band |
| KZ94A | band - metal band |
| KZ95A | band - metal band |
| KZ91B | band - metal band |
| KZ93A | band - metal band |
Other models with the same movement