The Seiko 2C20-5539 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) |
| ZEJ01G | band - leather band |
| ZEZ01G | band - leather band |
| BEJ05G | band - leather band |
| BEZ01G | band - leather band |
| KEJ01G | band - leather band |
| KEZ01G | band - leather band |
| 05V15DGM | hand - minute hand |
| 05L21DGH | others - hour hand |
| 82712470 | others - case ring |
| T090AS | others - push pin |
| 2C2010 | others - machine code |
| 2C201140XN24 | others - dial |
| 2C201150XG14 | others - dial |
| 2C20553925 | others - case |
| 05L07DGH | others - hour hand |
| 05V01DGM | others - minute hand |
| 1CA035A3BNG | others - hour hand |
| 2EA052A3BDG | others - minute hand |
Caliber 2C20
