The Seiko 1400-7420 is a watch model based on the 1400 movement.
Parts List
| ES2N93SN00 | crystal |
| 35N85DE5 | crown |
| 0H1850B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| MK15P | band - leather band |
| PK31A | band - leather band |
| A130BS | others - push pin |
| 08R01DGH | others - hour hand |
| 08R01DGM | others - minute hand |
| 1CA050A1BJG | others - hour hand |
| 1CA050A1BNG | others - hour hand |
| 2CA075A1BDG | others - minute hand |
| 2CA075A1BHG | others - minute hand |
Caliber 1400
