The Seiko 1220-5439 is a watch model based on the 1220 movement.
Parts List
| RE6N29SN00 | crystal |
| 25N01DA6 | crown |
| 0H1800B01 | case back gasket - case back gasket |
| 0H1800B0 | case back gasket |
| BLA22G | band |
| DZ0040B01 | others - crown and stem gasket |
| 0351117 | others - winding stem |
| 06L03CGM | others - minute hand |
| 06L01DGM | others - minute hand |
| 1CA042A1BAA | others - hour hand |
| 1CA040A1BNG | others - hour hand |
| 06L03CGH | others - hour hand |
| 06L01DGH | others - hour hand |
Caliber 1220
