The Seiko 2P20-0B4B is a watch model based on the 2P20 movement.
Parts List
| 205N16JM03 | crystal |
| 32M12EA1 | crown |
| 0A1900N0 | case back gasket |
| DZ0041B01 | others - crown and stem gasket |
Caliber 2P20
Seiko 2P20-0B4B Watch Guide
The Seiko 2P20-0B4B is a watch model based on the 2P20 movement.
| 205N16JM03 | crystal |
| 32M12EA1 | crown |
| 0A1900N0 | case back gasket |
| DZ0041B01 | others - crown and stem gasket |