The Seiko 2C20-5400 is a watch model based on the 2C20 movement.
Parts List
| ESPN11HN00 | crystal |
| 30N77NA1 | crown |
| 30N77NS1 | crown |
| 0H1650B01 | case back gasket - case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| M5019G | band - metal band |
| M5019G-BK3G | clasp - clasp |
| T060BS | others - push pin |
| 2C200840XG14 | others - dial |
| 2C2010 | others - machine code |
| 2C20540025 | others - case |
| 82706850 | others - case ring |
| 05V01DGM | others - minute hand |
| 1CA035A3BNG | others - hour hand |
| 2EA052A3BDG | others - minute hand |
| ESPN11HN00 | crystal |
| 30N77NA1 | crown |
| 30N77NS1 | crown |
| 0H1650B01 | case back gasket - case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| M5019G | band - metal band |
| M5019G-BK3G | clasp - clasp |
| T060BS | others - push pin |
| 2C200840XG14 | others - dial |
| 2C2010 | others - machine code |
| 2C20540025 | others - case |
| 82706850 | others - case ring |
| 05V01DGM | others - minute hand |
| 1CA035A3BNG | others - hour hand |
| 2EA052A3BDG | others - minute hand |
Caliber 2C20
