The Seiko 7N42-800A 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 |
| B1788C-LKG | band - link |
| B1788C | band |
| BRA54S | band |
| B1788C-PB1 | clasp - parts for buckle/clasp |
| B1788C-BK2S | clasp - clasp |
| B1788C-EPG | others - endpiece |
| 82851310 | others - case ring |
| 81332899 | others - bezel spring |
| 0878588 | others - date dial |
| 0878589 | others - date dial |
| 7N423 | others - machine code |
| 7N42800A | others - case back |
| 7N42800A98 | others - case |
| 7N42800LXB14 | others - dial |
| 7N42800LXG14 | others - dial |
| 8601327B | 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 |