The Seiko 1220-5390 is a watch model based on the 1220 movement.
Parts List
| REGN35SV01 | crystal - crystal |
| 30M31DA5 | crown |
| 0G1940B02 | case back gasket |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| MK27C | band - band |
| 06L49JGH | others - hour hand |
| 06L49JGM | others - minute hand |
| A130AS | others - push pin (for lb) |
| 12200630XS14 | others - dial |
| 122010 | others - machine code |
| 12205390EBA | others - case |
| 82810830 | others - case ring |
| 0351117 | others - winding stem |
Caliber 1220
