Anyone who worked a C&K booth at an electronics trade show is familiar with this display.
p.s. I found a couple hundred 35-mm slides in my basement recently. They were stained an in poor condition. I sent them out to www.scancafe.com. They sent them to their operation in India. They cleaned the slides, then digitized them, and sent me a CD with the images back to me.
Photo: 1975 00 00 USA MA Watertown CK Display board