The Seiko 1221-5790 is a watch model based on the 1221 movement.
Parts List
| K05N77JN01 | crystal - crystal (inorganic) |
| 30N99NA1 | crown - crown |
| 0G1600B01 | case back gasket - case back gasket |
| TZ04A | band - metal band |
| TZ05A | band - metal band |
| 3BA075F1BNG | others - second hand |
| 0351117 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 122110 | others - machine code |
| 12211100XG14 | others - dial |
| 12211100XS14 | others - dial |
| 1221579025 | others - case |
| 82722750 | others - case ring |
| 05P17NGH | others - hour hand |
| 05P17NGM | others - minute hand |
| 05SC05NG | others - second hand |
| 1AA032A3BNG | others - hour hand |
| 2AA050A1BNG | others - minute hand |
| 2AA050A3BNG | others - minute hand |
Caliber 1221
