The Seiko 2C21-0390 is a watch model based on the 2C21 movement.
Parts List
| 290N41JN00 | crystal - crystal |
| 35NR5NA1 | crown |
| 0H2550B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| YL25A | band - band |
| 3AA125F1ANG | others - second hand |
| 12P01NGH | others - hour hand |
| 12P01NGM | others - minute hand |
| 12SC39T1 | others - second hand |
| 1AA085A1BNG | others - hour hand |
| 2AA120A1BNG | others - minute hand |
| 0351226 | others - winding stem |
| 82712390 | others - case ring |
| 2C21039025 | others - case |
| 2C2110 | others - machine code |
| 2C211580XG14 | others - dial |
| A170AS | others - push pin |
Caliber 2C21
