Imagesource: https://youtu.be/fMxOWngmy8I

Most people will most likely know the KIM-1 in the form in which the machine is shown in most presentations - as a single extension board, which can certainly be operated separately. But the KIM-1 can also be connected with several add-on boards via an 8-bit bus and form a more complex construct. You just don't see it that often. 

Dave Plummer from Dave's Garage somehow managed the stunt, and got hold of exactly such a complete machine. Witchcraft. Black magic. Rich granny. I don't know ... 👵

In his current video he takes apart the machine completely, and feels the pulse of the individual components.

Worth seeing, if you want to have a look at the computer, which was initially planned as a 6502 demo board.