The Seiko 1221-0040 is a watch model based on the 1221 movement.
Parts List
| 180W11HN00 | crystal - crystal (inorganic) |
| 32M11NA1 | crown - crown |
| 0G140BAA1 | case back gasket - case back gasket |
| 86174900 | crystal gasket - plastic gasket for crystal |
| 86560210 | bezel gasket - plastic gasket for bezel |
| HA05A | band - metal band |
| 08P91NGH | others - hour hand |
| 08P91NGM | others - minute hand |
| 1AX052AABNG | others - hour hand |
| 3BA125F1BNG | others - second hand |
| EB0055B01 | others - crown and stem gasket |
| 0351117 | others - winding stem |
| 122100406Y | others - case |
| 12210210XS19 | others - dial |
| 122110 | others - machine code |
| A120AS | others - push pin |
| A180AS | others - push pin |
| 83133030 | others - case ring |
| 83343175 | others - bezel |
| 08SC29NG | others - second hand |
Caliber 1221
