The Seiko 1221-5490 is a watch model based on the 1221 movement.
Parts List
| ES2W87HN00 | crystal - crystal (inorganic) |
| 32M17NA1 | crown - crown |
| 0F160BAA1 | case back gasket |
| 86173950 | crystal gasket - plastic gasket for crystal |
| HL18A | band - leather band |
| 07P21CGH | hand - hour hand |
| 07P21CGM | hand - minute hand |
| 3BA075F1BNG | others - second hand |
| 2AA070A1BAA | others - minute hand |
| 07SC17NG | others - second hand |
| 1AA045A1BAA | others - hour hand |
| 0351117 | others - winding stem |
| 82711310 | others - case ring |
| EB0055B01 | others - crown and stem gasket |
| 12210720XG18 | others - dial |
| 122110 | others - machine code |
| 12215490 | others - case back |
| 1221549075 | others - case |
| 1221549075A | others - case |
| 1221549075B | others - case |
| 1221549075C | others - case |
| A120AS | others - push pin |
Caliber 1221
