Motherboard of the <b><a href="https://en.wikipedia.org/wiki/KC_85" class="extiw" title="en:KC 85">KC 85/2</a></b>, a home computer which was manufactured in the GDR (East Germany) by the <a href="https://en.wikipedia.org/wiki/Kombinat_Mikroelektronik_Erfurt" class="extiw" title="en:Kombinat Mikroelektronik Erfurt">VEB Mikroelektronik</a> "Wilhelm Pieck" Mühlhausen. First introduced in 1984.
Enrico Grämer
Attribution
The author sent the photo to me.