The Seiko 1221-5890 is a watch model based on the 1221 movement.
Parts List
| ET4N27SN01 | crystal - crystal (sapphire) |
| 27M03DA5 | crown - crown |
| 0G1700B01 | case back gasket |
| 06S27JGH | hand - hour hand |
| 06S27JGM | hand - minute hand |
| 06S37JGH | hand - hour hand |
| 06S37JGM | hand - minute hand |
| 122110 | others - machine code |
| 12211300XG14 | others - dial |
| 12211310XS14 | others - dial |
| 1221589025A | others - case |
| 12215890EAA | others - case |
| 82813630 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 0351117 | others - winding stem |
| 06SS05VG | others - second hand |
Caliber 1221
