The Seiko 2C21-5160 is a watch model based on the 2C21 movement.
Parts List
| SADN63JN00 | crystal - crystal (inorganic) |
| 35NH5NS1 | crown - crown |
| 35NR9NA1 | crown - crown |
| 35NH5NA1 | crown |
| 0H1500B01 | case back gasket - case back gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
| HA11A | band - band |
| HA12A | band - band |
| 06SC15NG | others - second hand |
| 06SC15NS | others - second hand |
| 3BA075F1BNG | others - second hand |
| 3BA075F1BNS | others - second hand |
| 06P03NGM | others - minute hand |
| 06P03NSH | others - hour hand |
| 06P03NSM | others - minute hand |
| 1AA037A1BNG | others - hour hand |
| 1AA037A1BNS | others - hour hand |
| 2AA055A1BNG | others - minute hand |
| 2AA055A1BNS | others - minute hand |
| 0351225 | others - winding stem |
| 2C21516025 | others - case |
| 06P03NGH | others - hour hand |
| 82714310 | others - case ring |
| 2C2151602E | others - case |
| 2C210440XG14 | others - dial |
| 2C210440XS13 | others - dial |
| 2C2110 | others - machine code |
| 2C211300XG14 | others - dial |
| A110AS | others - push pin |
Caliber 2C21
