The Seiko 2C20-0400 is a watch model based on the 2C20 movement.
Parts List
| 190A02JN02 | crystal - crystal (inorganic) |
| 190NA7HN00 | crystal |
| 30N77N01 | crown - crown |
| 0G1890B0A | case back gasket |
| 0G1700B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| BJA26D | band - leather band |
| A130AS | others - push pin (for lb) |
| 2C2004001B | others - case |
| 2C2010 | others - machine code |
| 2C202450XB14 | others - dial |
| 82300018 | others - bezel |
| 82706570 | others - case ring |
Caliber 2C20
