You can clearly see where the inspiration for the door hinges came from when looking at the Triumph Spitfire door hinges. I guess the same company made the Midas hinges.
The parts on the Midas hinge are assembled 180 degrees round from the Spitfire ones and the kink on the door side of the hinge is less (perhaps)on a Midas, but certainly the same pressed blank.
Perhaps another Triumph/Austin car has the exact same Midas hinge?
http://www.rimmerbros.co.uk/Item--i-607824