The Seiko 7N42-0EK0 is a watch model based on the 7N42 movement.
Parts List
| RE1AW4JB0B | crystal - crystal (inorganic) |
| RE1AW4JB0C | crystal - crystal (inorganic) |
| 8K50BPSNW1 | crown - crown (3h) |
| 0F340BAD2 | case back gasket - case back gasket |
| HA0N1ML | band - leather band |
| HA0N1MLBDB | band - leather without buckle |
| HA0N2ML | band - leather band |
| HA0N2MLBDB | band - leather without buckle |
| HA0N3JL | band - leather band |
| HA0N3JLBDB | band - leather without buckle |
| HA0N4JL | band - leather band |
| HA0N4JLBDB | band - leather without buckle |
| B0TW15SA06B | clasp - clasp |
| B0TW15SF04B | clasp - clasp |
| B0TW15SF05B | clasp - clasp |
| 2BX115FNBEN | hand - minute hand |
| 3AX120FZAEB | hand - second hand |
| 3AX120FZAER | hand - second hand |
| 3AX120FZAES | hand - second hand |
| 2BX115FNBES | others - minute hand |
| 1AX077F2BET | others - hour hand |
| 1AX077F2BES | others - hour hand |
| 82770720 | others - case ring |
| 0878618 | others - date dial |
| S180BS | others - push pin |
| AD006BAD1 | others - crown and stem gasket |
| 0351892 | others - winding stem |
| 7N420EK0 | others - case back |
| 7N420EK001C | others - case |
| 7N420EK002C | others - case |
| 7N420EK003C | others - case |
| 7N420EK004C | others - case |
| 7N420HC4XB1Z | others - dial |
| 7N420HC4XL1Z | others - dial |
| 7N420HC4XR1Z | others - dial |
| 7N420HC4XZ1Z | others - dial |
| 7N423 | others - machine code |