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