The Seiko 1221-0120 is a watch model based on the 1221 movement.
Parts List
| 175N17HN00 | crystal - crystal (inorganic) |
| 30N63NA1 | crown - crown |
| 0G1700B01 | case back gasket |
| DZ44A | band - metal band |
| 07P79DGH | hand - hour hand |
| 07P79DGM | hand - minute hand |
| 3BA075F1BNG | others - second hand |
| 07SC17NG | others - second hand |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| DZ0040B01 | others - crown and stem gasket |
| 0351117 | others - winding stem |
| 1221012025 | others - case |
| 12210920XG14 | others - dial |
| 122110 | others - machine code |
| 82706630 | others - case ring |
Caliber 1221
