Hi, first buckle is from army parade uniform and was made before WWII. Black painting isn´t original. original surface of these buckles looks like polished brass. Buckles for field uniform were made from one piece of brass and black finished.
Similar buckles were also used in the years 1945-1962, when were introduced buckles with star (#3). The lion on post war buckles have different tails - ends of tails on pre-war buckles are oriented upward, ends on post war buckles are little bigger and oriented forwards.