Case for Joystick adapter / tester for ZX Spectrum from ByteDelight.com / ZXSectrum.shop
Case provides cover and protection for the board, whilst allowing access to both the serial connections and power port, and visibility of the led indicators.
The adaptor is secured into the box simply by slotting the serial port wings into place between the box wall and the braces. Further bracing holds the other end steady.
The lid simply snaps into place.