I always wished the K-7 model had been more accurate, but even so it was a cool item. I painted mine silver with gold cones. Note our old stereo with a rack of 8-track tapes.
Sadly, I didn't even think to photograph most of my models back when they still existed. That was when you had to go out and buy film. And after shooting something, you had to take the film back to be developed, wait a week to ten days, and then go back again to pick up your prints. It was a pain.
So all I have now is a couple of vintage snapshots.