1930s design style (2 wds.) (3,4)
I believe the answer is:
art deco
(Other definitions for art deco that I've seen before include "Redcoat (anag) -- inter-war design style" , "1920s/1930s style" , "Style of 1920s/30s" , "1920s and 1930s style of ornamentation" , "Style popular in the 1920s and '30s" .)