It's a bike with the most humongous rear dropouts ever!!
Weird thing is, even if they might be just pressed steel plates, they must add a tremendous amount of weight to the bike, so they must have had some big reason for doing such a design on a bike frame. Thing is, they didn't even try to at least make the plates look nice, except for that dart shape towards the chainstay ends,. They just look monsterous back there!
Chombi