The Seiko 7N42-0CJ0 is a watch model based on the 7N42 movement.
Parts List
| 300PX5JN02 | crystal - crystal (inorganic) |
| 8K60BNSNW1 | crown - crown (3h) |
| 8K60BNSNG1 | crown - crown (3h) |
| FE318BAD2 | case back gasket - case back gasket |
| 0Z3314B02 | case back gasket - rotating bezel gasket |
| 86178611 | crystal gasket - plastic gasket for crystal |
| 86178610 | crystal gasket - plastic gasket for crystal |
| 34D9ZB | band - band |
| 34D9XB | band - band |
| 4KK5ZB | band - leather band |
| 34D9XB-LK | band - link |
| 34D9XB-BK | clasp - buckle |
| 34D9XB-PB | clasp - parts for buckle |
| 3AA125F0ANG | others - second hand |
| 3AA125F0AAH | others - hand |
| 1AA080F4BES | others - hour hand |
| 2BA120F8BES | others - minute hand |
| 1AA080F4BEG | others - hour hand |
| 2BA120F8BEG | others - minute hand |
| AD006BAD1 | others - crown and stem gasket |
| 7N420CJ001B | others - case |
| 85936029 | others - rotating bezel |
| 7N420CJ0 | others - case back |
| 0351892 | others - winding stem |
| 82736540 | others - case ring |
| 0878580 | others - date dial |
| 7N420CJ002B | others - case |
| 7N420EG8XB13 | others - dial |
| 7N420EG8XS14 | others - dial |
| 7N423 | others - machine code |
| 81332049 | others - click spring |
| 84356244 | others - dial ring |
| 84356245 | others - dial ring |
| S200BS | others - push pin |