ATARI 1040 ST/STE STMI Mouse Mitsumi

Fairly standard, vintage mouse brick released for the Atari ST/STE. The PCB is stamped 'Mitsumi' and is the usual micro switch, and light sensor switch with fans on rollers affair.

The only notable feature is that if you swap three wires over you can use it with a Commodore Amiga.

Atari 1040 ST STE Mouse
Unit pictured has been sold and its location is unknown.