Forks look quite track-like so my first thought is that they're converted track bikes.
But bosses for shifters/bottles/cables make that less likely...
as @midlife said, rear facing dropouts were a thing on 80's TT bikes with super tight clearances but these don't look like retro-TT exotica - on balance I'd want to be convinced that they're not meticulously converted track bikes.
Thanks for the great info, these things are a total enigma. Might steer clear of them for now, unless they are very cheap then might just be worth the oddity!
Have to say I'm no expert, but the rear facing dropouts were more a british thing I guess. I have not seen many classic steel tt bikes with those on the continent. Here's Obree riding his tt 'conversion':
Forks look quite track-like so my first thought is that they're converted track bikes.
But bosses for shifters/bottles/cables make that less likely...
as @midlife said, rear facing dropouts were a thing on 80's TT bikes with super tight clearances but these don't look like retro-TT exotica - on balance I'd want to be convinced that they're not meticulously converted track bikes.