The Seiko 5M42-0J80 is a watch model based on the 5M42 movement.
Parts List
| 285W34SV01 | crystal |
| 40MD4NN1 | crown - crown |
| FH2981B01 | case back gasket - case back gasket |
| 80604261 | pusher - button |
| D0B0CZ | band - band |
| D0B0CZ-BK | clasp - clasp |
| 1BB080A2BAC | others - hour hand |
| 2BB120A2BCC | others - minute hand |
| 3AA125F0ANB | others - second hand |
| 81400709 | others - button spring clip |
| 81350540 | others - button spring |
| EG0060B01 | others - button gasket |
| 0351651 | others - winding stem |
| 5M420J80WF | others - case |
| 5M420J80 | others - case back |
| 0866640 | others - holding ring for dial |
| 0878729 | others - date dial |
| 5M420M90XS14 | others - dial |
| 5M425 | others - machine code |
| A180BS | others - push pin |
| 0Z0060B01 | others - crown and stem gasket |
Caliber 5M42
