I have a good collection of magazines from the 70's and early 80's and Konica has plenty of ads in every magazine. They misfired though, on things that didn't matter at the time, like hyping their built-in motor drive when they were the only one that had it. Every other camera made, up til then, had an add-on winder so it wasn't the cat's meow Konica thought it was. I think too, they failed in that camera stores had to limit what they sold (except the giant stores) so Konica just plain got left out. Towards the end they stopped building their own bodies and farmed them out, and those bodies were real stinkers compared to reliable workhorses like the Autoreflex T3.
The glass is top notch. I love hauling my Konica's out for fine B&W work.