My wife collects, well darn near everything but she collects art deco, too. Seems like she said the 'period' ended in the mid-30's but that may just be art/craft-wise. Dunno about cars. When were airflows built? They were always called art deco.

Really nice car, though! I had a buddy in high school who had a coupe like that but I think it had square headlights? Maybe it was not stock.