The Seiko 7N42-0EC0 is a watch model based on the 7N42 movement.
Parts List
| 330P02SN02 | crystal - crystal (sapphire) |
| 8K55BWSNG1 | crown - crown (3h) |
| 8K55BWSNW1 | crown - crown (3h) |
| 0F320BAD2 | case back gasket - bezel gasket |
| 86566900 | crystal gasket - crystal plastic gasket |
| 86566901 | crystal gasket - plastic gasket for crystal |
| 4A881JM | band - metal band |
| 4A881JM-LK | band - link |
| 4A881LM | band - metal band |
| 4A881LM-LK | band - link |
| 4A881LM-PB | clasp - parts for buckle/clasp |
| 4A881LM-BK | clasp - clasp |
| 4A881JM-PB | clasp - parts for buckle/clasp |
| 4A881JM-BK | clasp - clasp |
| 1AA085L0BE1 | hand - hour hand |
| 1AA085L0BE2 | hand - hour hand |
| 2BA130LABE2 | hand - minute hand |
| 2BA130LABES | hand - minute hand |
| 3AA135F1ANG | others - hand |
| 3AA135F1ANS | others - hand |
| 81611219 | others - bracelet fixing pin |
| 81190075 | others - bracelet fixing pipe |
| AD006BAD1 | others - crown and stem gasket |
| 0351892 | others - winding stem |
| 82838840 | others - case ring |
| 0878580 | others - date dial |
| 4A881JM-EP | others - endpiece |
| 4A881LM-EP | others - endpiece |
| 7N420EC0 | others - case back |
| 7N420EC001B | others - case |
| 7N420EC002B | others - case |
| 7N420EC003B | others - case |
| 7N420EC004B | others - case |
| 7N420GR8XB13 | others - dial |
| 7N420GR8XB24 | others - dial |
| 7N420GR8XL13 | others - dial |
| 7N420GR8XS13 | others - dial |
| 7N420GR8XS24 | others - dial |
| 7N423 | others - machine code |