There appears to be a little residue left on the sign from the original rice paper that would have been on them. Some of this might be able to be cleaned off. They were made by Donaldson.
Please Check pictures to see exact condition. The item "Vintage 1930s Tin Advertising Sign 5 Cent Chocolate Mounds Candy Bar EMBOSSED" is in sale since Monday, October 10, 2016. This item is in the category "Collectibles\Advertising\Merchandise & Memorabilia\Signs\Original\1930-69". The seller is "bwild99" and is located in West Union, Iowa. 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, ID, to Taiwan, ZA, 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, PH, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, BR, CL, CO, CR, PA, TT, GT, HN, JM.