The Seiko 2C21-0290 is a watch model based on the 2C21 movement.
Parts List
| 185W15HN00 | crystal - crystal |
| 35E33NA1 | crown - crown |
| 35E29NA1 | crown |
| FE198BAA1 | case back gasket - case back gasket |
| 86571670 | crystal gasket |
| 86572030 | bezel gasket - plastic gasket for bezel |
| HL40A | band - band |
| 3BA075F1BNG | others - second hand |
| 07SC43NG | others - second hand |
| 08P39DCM | others - minute hand |
| 08PC7DGH | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 0351225 | others - winding stem |
| 82706930 | others - case ring |
| EB0055B0A | others - crown and stem gasket |
| 2C210290SF | others - case |
| 82330911 | others - bezel |
| 2C2110 | others - machine code |
| 2C211060XS14 | others - dial |
| 81832252 | others - case bow |
| A130BS | others - push pin |
Caliber 2C21
