The Seiko 7C21-0A20 is a watch model based on the 7C21 movement.
Parts List
| 429N01AN00 | crystal |
| 428N01AN02 | crystal - crystal (organic) |
| 1M70A0BNW1 | crown - crown |
| 0E430BA1S | crystal gasket - crystal gasket |
| AN040 | band - band |
| 17SM02AB | others - second hand |
| 18D02NBM | others - minute hand |
| 20D01NBH | others - hour hand |
| 18D02FBM | others - minute hand |
| 20D01FBH | others - hour hand |
| DF016BAD2 | others - crown and stem gasket |
| 7C210A2013 | others - case |
| 7C210A20 | others - case back |
| 7C210A2013A | others - case |
| 7C210A2013B | others - case |
| 0866544 | others - holding ring for dial |
| 7C210A10XS19 | others - dial |
| 7C210A20XS19 | others - dial |
| 7C212 | others - machine code |
| 81870862 | others - case bow |
| 83336004 | others - bezel |
| 0351926 | others - winding stem |
| 85940303 | others - bezel |
| DJ0160B01 | others - pusher gasket |
Other models with the same movement