The Seiko 2C20-5550 is a watch model based on the 2C20 movement.
Parts List
| SAEN05JN00 | crystal |
| 32N09NA1 | crown |
| 0H1450B01 | case back gasket - case back gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
| D5015G | band - metal band |
| D5015G-BK3G | clasp - clasp |
| 1CA032A3BNG | others - hour hand |
| 05V09DGM | others - minute hand |
| 2C2010 | others - machine code |
| 2C201180XR14 | others - dial |
| 2C20555025 | others - case |
| 82712490 | others - case ring |
| T080AS | others - push pin |
Caliber 2C20
