There are 5 bakelite preset buttons down the right side that work properly. The control knobs are also bakelite. Everything works on the radio, but it does not have a back plate.
The back plate number is S237412. The item "Zenith Art Deco Bakelite Radio 1938 Model 6D312" is in sale since Tuesday, January 19, 2016. This item is in the category "Collectibles\Radio, Phonograph, TV, Phone\Radios\Tube Radios\1930-49". The seller is "wny1map" and is located in West Henrietta, New York. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, SG, to Switzerland, NO, SA, AE, QA, KW, BH, HR.