WOW!
An interesting contribution.
Credit where credit is due!
Pretty cool camera there... My father holds a patent for a camera that would have taken two pictures - one in color, and one in black and white although the lenses were one on top of the other, not side by side like that one... It was never developed which I think is a shame (at least as far as I know it was never developed, but now that I think about it I wonder... Do you know what year your “ad” was published in by chance? From the looks of it I would guess in the 50s? If so, that was before my father sent his ideas in...). The B&W/Color camera, I think, would’ve been a pretty cool thing back when we all still used regular film! :)