The Seiko 7N42-8270 is a watch model based on the 7N42 movement.
Parts List
| 300P29HN02 | crystal - crystal |
| 8K55B8SNW1 | crown - crown |
| 8K55B8SNN1 | crown - crown |
| FE318BAD2 | case back gasket - case back gasket |
| 86573715 | crystal gasket - plastic gasket for crystal |
| 86592810 | bezel gasket - plastic gasket for bezel |
| W289AM | band - band |
| W290DM | band - band |
| 2BB120F0BES | others - minute hand |
| 1AB075GCBES | others - hour hand |
| 3AX125FNAAW | others - second hand |
| 0351892 | others - winding stem |
| 82862330 | others - case ring |
| 7N42827061A | others - case |
| 82314655 | others - bezel |
| 7N428270WEA | others - case |
| 7N429294XB13 | others - dial |
| 7N429304XB19 | others - dial |
| 89920255 | others - back plate |
| A200BS | others - push pin |
| AD006BAD1 | others - crown and stem gasket |