When the ZX81 wanted to play with the big boys
Joystick adapter produced by STC Rotterdam, a Dutch company of the 1980s. It connects to the rear expansion port of the ZX81 or Timex Sinclair 1000 and provides a standard DB9 connector compatible with Atari/Commodore joysticks. A rare and poorly documented item, typical of the local peripheral market that revolved around the Sinclair scene in continental Europe.
