The Seiko 1221-5600 is a watch model based on the 1221 movement.
Parts List
| ESSN15JN00 | crystal - crystal (inorganic) |
| 30N63NA1 | crown - crown |
| 0H1500B01 | case back gasket - case back gasket |
| HZ27A | band - metal band |
| 2AA060A1BDG | hand - minute hand |
| 06P09DGH | hand - hour hand |
| 06P09DGM | hand - minute hand |
| 3BA075F1BNG | others - second hand |
| 1AA040A1BNG | others - hour hand |
| 2AA060A1BNG | others - minute hand |
| 06SC11NG | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351117 | others - winding stem |
| 12210850XG14 | others - dial |
| 122110 | others - machine code |
| 1221560025 | others - case |
| 82711610 | others - case ring |
Caliber 1221
