The Seiko 5M42-0J20 is a watch model based on the 5M42 movement.
Parts List
| 290P56HN03 | crystal |
| 8K55A2SNW1 | crown - crown weiss |
| 8K55A2SNG2 | crown - crown |
| FH2980B0A | case back gasket - case back gasket |
| 86565320 | crystal gasket - plastic gasket for crystal |
| 86178690 | bezel gasket - plastic gasket for bezel |
| 80601361 | pusher |
| 80601369 | pusher - button |
| EC0060B01 | pusher - pusher gasket |
| 48A9JM | band - band |
| 48A9AM-LK4 | band - link |
| 48A9JM-LK5 | band - link |
| 48A9AM | band - band |
| 48A9AM-BKC | clasp - buckle |
| 48A9AM-PB1 | clasp - parts for buckle |
| 48A9JM-BKC | clasp - buckle |
| 48A9JM-PB1 | clasp - parts for buckle |
| 1AE075LBBTG | others - hour hand |
| 1AE075LBBTS | others - hour hand |
| 2AE115LABTG | others - minute hand |
| 2AE115LABTS | others - minute hand |
| 3AA125F1A6S | others - second hand |
| 3AA125F1ANG | others - second hand |
| 81350540 | others - button spring |
| 83200273 | others - button spring clip |
| 82292809 | others - bezel |
| 0351651 | others - winding stem |
| 5M420J2061W | others - case |
| 5M420J2061X | others - case |
| 5M420J2061Y | others - case |
| 5M420J2061Z | others - case |
| 0866636 | others - holding ring for dial |
| 0878729 | others - date dial |
| 0878730 | others - date dial |
| 5M420M50XS13 | others - dial |
| 5M420M58XB13 | others - dial |
| 5M420M58XL13 | others - dial |
| 5M420M58XS13 | others - dial |
| 5M420M58XS23 | others - dial |
| 5M420M58XS34 | others - dial |
| 5M425 | others - machine code |
| 84328584 | others - dial ring |
| 84328585 | others - dial ring |
| 84328586 | others - dial ring |
| 84328587 | others - dial ring |
| A180BS | others - push pin |
| 5M420J2061V | others - case |
| 5M420J2061 | others - case |
| 5M420J20 | others - case back |
| 0Z0060B01 | others - crown and stem gasket |
| 81400829 | others - button spring clip |
Caliber 5M42
