The Seiko 7N42-0CT0 is a watch model based on the 7N42 movement.
Parts List
| SA0AP6HN02 | crystal - crystal (inorganic) |
| 8K45C8SNW1 | crown - crown (3h) |
| 8K45C8SNG2 | crown - crown (3h) |
| 0F310BAD2 | case back gasket - case back gasket |
| 34S9JZ-LK | band - link |
| 34S9JZ | band - band |
| 34S9JZ-BK | clasp - buckle |
| 34S9JZ-PB | clasp - parts for buckle |
| 2BC120F2BEG | others - minute hand |
| 3AX130FMAEG | others - second hand |
| 2BC120F2BES | others - minute hand |
| 3AX130FMAE1 | others - second hand |
| 1AC072FABE1 | others - hour hand |
| 1AC072FABE2 | others - hour hand |
| 0351892 | others - winding stem |
| 81190075 | others - bracelet fixing pipe |
| 82799260 | others - case ring |
| 81607169 | others - bracelet fixing pin |
| 7N420CT0 | others - case back |
| 7N420CT002B | others - case |
| 7N420CT003B | others - case |
| 0878580 | others - date dial |
| 7N420CT001B | others - case |
| AD006BAD1 | others - crown and stem gasket |
| 7N420EV8XB13 | others - dial |
| 7N420EV8XL13 | others - dial |
| 7N420EW8XL14 | others - dial |
| 7N420EW8XS13 | others - dial |
| 7N423 | others - machine code |