The Seiko 2C20-521A is a watch model based on the 2C20 movement.
Parts List
| K04N99HN00 | crystal |
| 30N77NA1 | crown |
| 0E150NA1S | case back gasket - case back gasket |
| DZ0065B01 | case back gasket - button gasket |
Caliber 2C20
Seiko 2C20-521A Watch Guide
The Seiko 2C20-521A is a watch model based on the 2C20 movement.
| K04N99HN00 | crystal |
| 30N77NA1 | crown |
| 0E150NA1S | case back gasket - case back gasket |
| DZ0065B01 | case back gasket - button gasket |