The Seiko 2C20-6240 is a watch model based on the 2C20 movement.
Parts List
| RECN77JV01 | crystal |
| RECN77JV02 | crystal |
| RECN77JV | crystal |
| 30N77NA1 | crown |
| 0F170NA11 | case back gasket |
| 0F170NA1 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| DZ0065B0 | case back gasket |
| NL | band |
| BJJ08G | band - leather band |
| WJJ12C | band - leather band |
| WJJ12G | band - leather band |
| WJJ28G | band - leather band |
| 05R21DHH | hand - hour hand |
| 05R21DHM | hand - minute hand |
| A130AS | others - push pin (for lb) |
| 2C2010 | others - machine code |
| 2C202640XG14 | others - dial |
| 2C202640XG24 | others - dial |
| 2C20624025 | others - case |
| 2C2062402H | others - case |
Caliber 2C20
