ANTIQUE VINTAGE RC ROYAL CROWN COLA DONASCO 25 THERMOMETER SIGN. Glass is good and accurate. A slight metal bend as shown in the photo. See my other thermometers for sale. The item “ANTIQUE VINTAGE RC ROYAL CROWN COLA DONASCO 25 THERMOMETER SIGN” is in sale since Sunday, September 29, 2019. This item is in the category “Collectibles\Advertising\Soda\Royal Crown/Nehi/Diet Rite”. The seller is “john6769″ and is located in Shady Spring, West Virginia. This item can be shipped to United States.