The Seiko 1221-5020 is a watch model based on the 1221 movement.
Parts List
| ESDN93SE10 | crystal - crystal (inorganic) |
| ESDN93SE40 | crystal - crystal (inorganic) |
| 27N01NA5 | crown |
| 27N01N05 | crown - crown |
| 0H1650B01 | case back gasket - case back gasket |
| PK66A | band - leather band |
| PK68A | band - leather band |
| 06P25DGH | hand - hour hand |
| 06P25DGM | hand - minute hand |
| 12210060XB14 | others - dial |
| 12210060XG14 | others - dial |
| 122110 | others - machine code |
| 12215020 | others - case back |
| 122150201CA | others - case |
| 12215020EBA | others - case |
| 06SC19VG | others - second hand |
| 0351117 | others - winding stem |
| 83132050 | others - case ring |
| A120AS | others - push pin |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1221
