Maybe ask Mr Kuti? It looks similar to the second shoe from the left, in the pic below. I forgot what colour it is already, since it was a long time since I asked Rezső. Perhaps you can email him both pics.
Can anyone with the same size in both U and F lasts comment whether they are of the same outsole length and width?
Pretty sure second from left is Bordeaux, which is different. Does any one have a picture of a Vass shoe in Dark Red Cognac? Thanks a lot!