A similar binary programmed device we have discussed in this thread I think at some point was the OSI300 from November 1975.
Well I just came across a video showing one operating:
https://www.youtube.com/watch?v=3gEiJiN7TiM
it is 6502 obviously as we discovered but, seeing it in action is interesting and shows that the SCRUMPI was seriously much better - twice as much memory and good quality switches for half the price... $99 would have been around £147 as opposed to the SCRUMPI launch price of only £64.81 - although it was a year later in December 1976.