It's the long lost twin of my Rouge et Noir!
Not quite a Mixte, but it was the red and black on this Frenchie that stopped me in my tracks, as if I was looking into the mirror.
Its owner and I briefly discussed which twin was older or younger. I do believe my Mixte is from 1979, but I could be wrong. We couldn't figure out if the Mixte came first or this more feminine frame.