The Seiko 1221-5570 is a watch model based on the 1221 movement.
Parts List
| K05N39JN00 | crystal - crystal (inorganic) |
| 30N63NA1 | crown - crown |
| 0H1500B01 | case back gasket - case back gasket |
| 0H1550B01 | case back gasket |
| ZS10A | band - metal band |
| 3BA075F1BNG | others - second hand |
| 1AA042A1BNG | others - hour hand |
| 07SC25NG | others - second hand |
| 07P27DGH | others - hour hand |
| 07P27DGM | others - minute hand |
| 2AA065A1BDG | others - minute hand |
| 2AA065A1BNG | others - minute hand |
| 12210810XS24 | others - dial |
| 122110 | others - machine code |
| 1221557025 | others - case |
| 82711250 | others - case ring |
| T070AS | others - push pin |
| DZ0040B01 | others - crown and stem gasket |
| 0351117 | others - winding stem |
Caliber 1221
