The Seiko 5420-5280 is a watch model based on the 5420 movement.
Parts List
| SA7N28GN00 | crystal - crystal |
| 35M94NA1 | crown |
| 35M94NS1 | crown |
| 0A1700N01 | case back gasket - case back gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |
| XKC05A | band - leather band |
| KC05A | band - band |
| KC06A | band - band |
| 06R30NGH | others - hour hand |
| 06R30NGM | others - minute hand |
| 0354705 | others - winding stem |
| 5420528026 | others - case |
| 82705400 | others - case ring |
| 542052802N | others - case |
| 54200600XG14 | others - dial |
| 54200600XR14 | others - dial |
| 54200600XS14 | others - dial |
| 54209 | others - machine code |
Caliber 5420
