The Seiko 7N42-6B90 is a watch model based on the 7N42 movement.
Parts List
| 320P02SN03 | crystal - crystal |
| 8K60A3SNC0 | crown - crown |
| FE298BAD2 | case back gasket - case back gasket |
| 86566880 | crystal gasket - plastic gasket for crystal |
| 86566881 | crystal gasket - plastic gasket for crystal |
| 86583460 | bezel gasket - plastic gasket for bezel |
| 3093JP | band - band |
| 3093JP-LK2 | band - link |
| 3093JP-BKJ | clasp - buckle |
| 1AX080S2BTS | others - hour hand |
| 2BA115S2BTS | others - minute hand |
| 3AX130F8ASL | others - second hand |
| 3AX130F8ASS | others - hand |
| 81604259 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 82830140 | others - case ring |
| 7N426B9002D | others - case |
| 82345929 | others - bezel |
| 7N426B90 | others - case back |
| 7N426B9003D | others - case |
| 0878580 | others - date dial |
| 0351892 | others - winding stem |
| 7N423 | others - machine code |
| 7N426C58XL13 | others - dial |
| 7N426C58XS13 | others - dial |
| 84330765 | others - dial ring |
| 84330766 | others - dial ring |
| AD006BAD1 | others - crown and stem gasket |