Wonderful retro door knobs. This art deco styled one is cool. I would replace the knob with a crystal, angular knob.
Art deco interiors, marked by geometric patterns, metallic finishes and luxury elements, are a huge trend. Pieces from the era are seen as classic designs earning a place in the home, whether mid-century modern or firmly traditional.
Retro Swirl Switch Plate
Retro Swirl Switch Plate #anthropologie
Art deco styling ideas: Decorating Ideas: Interiors - Red Online