The PC 1715 was an office computer produced by VEB Robotron in East Germany starting in 1985.
It was built for office work and education, but was also put to some specialist uses, for example an optional interface was available for controlling a pacemaker.
Though it was common practice at the time for processors that failed normal quality tests to be reused with much reduced clock frequencies and this may have been the case here.
The system was identical to the PC 1715, except the processor was clocked at 4 MHz and the machine had 256KB DRAM.
In March 1987, a stamp was issued by the German Democratic Republic featuring the PC 1715.