The Seiko 7N42-800B is a watch model based on the 7N42 movement.
Parts List
| 290P29HN03 | crystal |
| 1E45A3SNG0 | crown |
| FE308BAA1 | case back gasket - case back gasket |
| 86591930 | crystal gasket |
| 0G315BA11 | bezel gasket - rotating bezel gasket |
| BRA54S | band |
| 82851310 | others - case ring |
| 81332899 | others - bezel spring |
| 0878580 | others - date dial |
| 7N423 | others - machine code |
| 7N42800B | others - case back |
| 7N42800B98 | others - case |
| 7N42800LXS14 | others - dial |
| 8601327C | others - rotating bezel |
| A200CS | others - push pin |
| 0D014BA11 | others - crown and stem gasket |
| 3AX110F3ALG | others - second hand |
| 3AX110FAAPG | others - second hand |
| 2AB112FABLG | others - minute hand |
| 1AX082FBBLG | others - hour hand |