The Seiko 7N42-8030 is a watch model based on the 7N42 movement.
Parts List
| 290P01LN03 | crystal - crystal (inorganic) |
| 8M40A0SNW1 | crown - crown |
| 8M40A0NNG3 | crown - crown |
| 0F240BAA3 | case back gasket - case back gasket |
| 86582730 | crystal gasket - plastic gasket for crystal |
| 86172740 | bezel gasket - plastic gasket for bezel |
| BPK52S | band |
| B1858C-LKG | band - link |
| B1858S-LKS | band - link |
| BPB31S | band - leather band |
| B1858C | band |
| B1858S | band |
| B1858S-PB1 | clasp - parts for buckle/clasp |
| B1858C-PB1 | clasp - parts for buckle/clasp |
| B1858S-BK2S | clasp - clasp |
| B1858C-BK2S | clasp - clasp |
| 3BA125F1BNG | others - second hand |
| 3BA125F1BNS | others - second hand |
| 0351892 | others - winding stem |
| B1858C-EPG | others - endpiece |
| 82851310 | others - case ring |
| 0878580 | others - date dial |
| 0878587 | others - date dial |
| 7N423 | others - machine code |
| 7N428030 | others - case back |
| 7N428030RL | others - case |
| 7N428030T0 | others - case |
| 7N42804LXB13 | others - dial |
| 7N42804LXN14 | others - dial |
| 82280815 | others - bezel |
| 82280819 | others - bezel |
| A180BS | others - push pin |
| 2AX117FABLG | others - minute hand |
| 2AX117FABLS | others - minute hand |
| AD006BA12 | others - crown gasket |
| 1AX080FGBLG | others - hour hand |
| 1AX080FGBLS | others - hour hand |