The Seiko 7N42-0BB0 is a watch model based on the 7N42 movement.
Parts List
| 300P30HN02 | crystal - crystal |
| 8E50A4SJW1 | crown - crown |
| FH3180B0A | case back gasket - case back gasket |
| 86178610 | crystal gasket - plastic gasket for crystal |
| 86178611 | crystal gasket - plastic gasket for crystal |
| 32P8JG | band - band |
| 3AX130FMASB | others - second hand |
| 3AX130FMASN | others - second hand |
| 2AX120F4BSB | others - minute hand |
| 2AX120F4BSP | others - minute hand |
| 1AX080F0BSB | others - hour hand |
| 1AX080F0BSP | others - hour hand |
| 0351892 | others - winding stem |
| 82736540 | others - case ring |
| 7N420BB001B | others - case |
| 7N420BB0 | others - case back |
| 7N420BB002B | others - case |
| 0878580 | others - date dial |
| 0878587 | others - date dial |
| 7N420CC8XB13 | others - dial |
| 7N420CC8XS13 | others - dial |
| 7N423 | others - machine code |
| 84351444 | others - dial ring |
| 84351445 | others - dial ring |
| S200BS | others - push pin |
| 0A0150B0A | others - crown and stem gasket |
| 89995390 | others - pusher spacer |