The Seiko 5M42-0D20 is a watch model based on the 5M42 movement.
Parts List
| 280P14SV0C | crystal - crystal |
| 40MF4N01 | crown - crown |
| FH2980B0A | case back gasket - case back gasket |
| 86177921 | crystal gasket - plastic gasket for crystal |
| 86179411 | bezel gasket - plastic gasket for bezel |
| EC0060B01 | pusher - pusher gasket |
| 80600548 | pusher - button |
| D0T6DM | band - band |
| 1AB080AEBFJ | others - hour hand |
| 2AB115AFBFJ | others - minute hand |
| 3AA125F0ANG | others - second hand |
| 81400709 | others - button spring clip |
| 81350540 | others - button spring |
| 82292104 | others - bezel |
| 5M420D20ZQ | others - case |
| 5M420D20 | others - case back |
| 0866636 | others - holding ring for dial |
| 0878729 | others - date dial |
| 5M420F81XS14 | others - dial |
| 5M425 | others - machine code |
| A180BS | others - push pin |
| 0351651 | others - winding stem |
| 81400829 | others - button spring clip |
| 0Z0060B01 | others - crown and stem gasket |
Caliber 5M42
