The Seiko 2C21-5180 is a watch model based on the 2C21 movement.
Parts List
| RE9N63JN00 | crystal |
| 35NH5NS1 | crown - crown |
| 35NH5NA1 | crown |
| 0G2860B01 | case back gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
| AK21B | band - band |
| AK23B | band - band |
| 09P07DSH | others - hour hand |
| 09P23DSM | others - minute hand |
| 09P07DGH | others - hour hand |
| 09P23DGM | others - minute hand |
| 09SC27NG | others - second hand |
| 3BA125F1BNG | others - second hand |
| 08P13DGH | others - hour hand |
| 08P13DGM | others - minute hand |
| 08P13DSH | others - hour hand |
| 08P13DSM | others - minute hand |
| 09SC27NS | others - second hand |
| 3BA125F1BNS | others - second hand |
| 0351226 | others - winding stem |
| 2C21518025 | others - case |
| 82712810 | others - case ring |
| 2C2151802E | others - case |
| 2C210520XG14 | others - dial |
| 2C210520XS13 | others - dial |
| 2C2110 | others - machine code |
| 2C211430XG14 | others - dial |
| 2C21518025A | others - case |
| 2C21518025X | others - case |
| 2C21518025Y | others - case |
| 2C2151802EX | others - case |
| A180BS | others - push pin |
| 09SC31NG | others - second hand |
Caliber 2C21
