The Seiko 7N42-0DY0 is a watch model based on the 7N42 movement.
Parts List
| 320A02SN02 | crystal - crystal (sapphire) |
| 8K40E2SNW1 | crown - crown (3h) |
| 8K40E2SNG1 | crown - crown (3h) |
| 0F290BA1S | case back gasket - case back gasket |
| 4LR1JE | band - leather band |
| 4LR1PE | band - leather band |
| 4LR2JE | band - leather band |
| 4LR2KE | band - leather band |
| 4LR2KE-BK | clasp - clasp |
| 4LR2KE-PB | clasp - parts for buckle/clasp |
| 4LR2JE-BK | clasp - clasp |
| 4LR2JE-PB | clasp - parts for buckle/clasp |
| 4LR1PE-BK | clasp - clasp |
| 4LR1PE-PB | clasp - parts for buckle/clasp |
| 4LR1JE-BK | clasp - clasp |
| 4LR1JE-PB | clasp - parts for buckle/clasp |
| 1BA095L2BDG | hand - hour hand |
| 1BA095L2BDS | hand - hour hand |
| 1BC085A1BNG | hand - hour hand |
| 1BC085A1BNS | hand - hour hand |
| 1BG082L0BDS | hand - hour hand |
| 2BA135L0BDG | hand - minute hand |
| 2BA135L0BDS | hand - minute hand |
| 2BC140A1BNG | hand - minute hand |
| 2BC140A1BNS | hand - minute hand |
| 2BG130L0BDS | hand - minute hand |
| 3AA150F0ANG | hand - second hand |
| 3AA150F0ANS | hand - second hand |
| 82845500 | others - case ring |
| 0878580 | others - date dial |
| AD006BAD1 | others - crown and stem gasket |
| 0351892 | others - winding stem |
| S200BS | others - push pin |
| 7N420DY0 | others - case back |
| 7N420DY001B | others - case |
| 7N420DY002B | others - case |
| 7N420GJ8XG14 | others - dial |
| 7N420GJ8XS13 | others - dial |
| 7N420GJ8XS24 | others - dial |
| 7N420GK8XS13 | others - dial |
| 7N420GK8XS24 | others - dial |
| 7N420GL8XS13 | others - dial |
| 7N423 | others - machine code |