As you probably know, the Art Deco period (1920's) began near the end of the Art Nouveau period (1880 - 1920 +/-), which explains why you see a lot of the Art Nouveau influence in Art Deco. Simply speaking, Art Deco took what Art Nouveau started and raised it to a new level - it rendered objects even more 'design'. In my opinion, this door is clearly a product of that overlap period. The rest speaks for itself!!