I am sure the 8052 is not a prototype. I got this information from the peripheral exchange Website:-
Intecolor 8050/8060 Series
In 1978, additional options were designed to extend basic terminal operations into one of the first standalone microcomputers. Operating systems incorporated within the product included a version of Extended Microsoft BASIC language (in EPROM) which was based on Microsoft BASIC (at the time). Options for 5-1/4" or 8-0" floppy disk drives (made by Wangco, Shugart, or Seimens), light pens from Information Control Systems (ICC), printer drivers supported (Centronics, Daisywriter, Okidata, Qume, Printronix and a few others), programming languages (BASIC, 8080 ASM, FORTRAN IV), and developer tools were added to the product line.
The keyboard is totally separate unit which may not actually be manufactured by ISC. The display has keyboard/modem/floppy drive connectors at the back.