The Seiko B122-4050 is a watch model based on the B122 movement.
Parts List
| SA1W70GM02 | crystal |
| SA1W70GM01 | crystal |
| 35M74NS1 | crown |
| 35M74NA1 | crown |
| FH2281B01 | case back gasket - case back gasket |
| 0A0064B01 | case back gasket |
Other models with the same movement
| B122-4000 |
| B122-4010 |
| B122-4020 |
| B122-4030 |
| B122-5000 |