Good morning, Hoffy;
This goes back earlier than that. Doctor Harold Edgerton of MIT had developed a light to do that back in the 1930s, and a book on how the flash was used in photography was published in 1939. I think I can find it to get the exact title if needed. The original General Radio Stroboscope used a red Neon flash tube. Harold Edgerton did a lot of work with the Atomic Energy Commission in photographing such things as nuclear explosions. It has been around for a while. I seem to remember that the Xenon flash tube was coming into greater use in the 1950s. I know that by the 1960s, "electronic flash" was making great inroads into photography, but the small and lighter flash bulbs were still going strong. We were still using AG-1, M2, 26, FlashCubes, Flip-Flash and similar things well into the 1980s. They were a lot smaller and much lighter and gave a lot of light output in comparison with the electronic flash units commonly available. The flash units that had similar lighting output in comparison with the flash bulbs we commonly called "potato mashers," because that is what they looked like, and they were big and heavy, and the best way to operate them was with an external 510 volt battery pack for a really short recycle time. I did have a Heiland-Honeywell model 600 Strobonar in the late 1960s, and I think it came out either in 1966 or 1967, so it will be a proper period piece for use with your Koni-Omega. Any one of that series from the 65C through the 882 will fit well with your K-O. By the way, I do have a K-O Rapid-M here with the 5.6/58mm WA, the 3.5/90mm Normal, and a 4.5/180mm Telephoto lenses.