The Seiko 2C20-6399 is a watch model based on the 2C20 movement.
Parts List
| K05N43JN00 | crystal |
| 32N09NA1 | crown |
| 0H1400B01 | case back gasket - case back gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
| BEA06G | band - leather band |
| BEJ05G | band - leather band |
| KEA01G | band - leather band |
| KEJ01G | band - leather band |
| 1DG035LABDG | others - hour hand |
| 05R07DGH | others - hour hand |
| 82712470 | others - case ring |
| 2C2010 | others - machine code |
| 2C202850XB15 | others - dial |
| 2C202850XG15 | others - dial |
| 2C20639925 | others - case |
| T090AS | others - push pin |
| 05R07DGM | others - minute hand |
Caliber 2C20
