<b>Self-made keyboard</b> (made from a <a href="https://en.wikipedia.org/wiki/Commodore_64" class="extiw" title="en:Commodore 64">C64</a> keyboard) for the East German single-board home computer <b><a href="https://en.wikipedia.org/wiki/Z1013" class="extiw" title="en:Z1013">Robotron Z1013</a></b>, manufactured by the <a href="https://en.wikipedia.org/wiki/Robotron" class="extiw" title="en:Robotron">VEB Robotron</a>-Elektronik Riesa.
Z1013-Rene (doesn't want to announce his real name)
Attribution
The author sent the photo to me.