I have also tried to find pictures of Erno Rubik's first prototype from 1974 but I couldn't find many pictures of it. Does this still exist?
For 3 years I have worked for Rubik Studio.
At that time, once I had the chance to hold and twist the 3x3x3
prototype cube. Unfortunately I was not allowed to take any pictures from it.
So to answer you, Yes it still exists!
To be honest, it is not playable. very loose, and easy to POP.
And just to make it clear, this was the first prototype cube, and not the 3x3x3:
of course it is just 4 cubes connected with rubber bands, and it had no inner structure.
Did they use the same molds for this run or did they made new molds? And have the first molds been used even after these first cubes?
I’m pretty sure, they re-used the first mold, but probably after some time it was renewed.
At the early 80’s it was not easy to make new molds, so they used used every single mold they had.