The Seiko 1221-5090 is a watch model based on the 1221 movement.
Parts List
| ESEN61SN00 | crystal - crystal (sapphire) |
| 30N59DA6 | crown - crown |
| 0H1700B01 | case back gasket - bezel gasket |
| 06P25DGH | hand - hour hand |
| 06P25DGM | hand - minute hand |
| 12210170XS14 | others - dial |
| 122110 | others - machine code |
| 1221509026A | others - case |
| 83133230 | others - case ring |
| 06SC19VG | others - second hand |
| 0351117 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1221
