Very cool 1950′s classroom teaching aid for tube radio instruction. It shows a radio that has been layed out breadboard style and how the components work. It was made so that it can actually be turned on and tune in different radio stations. This was found in a closet of a public school that was being torn down. It was covered with a ton of dust so obviously had not been used in years, probably decades. It is in nice cosmetic condition. It will probably need some attention to get it going again. It has the Welch Scientific label on it. It is similar in design to the RCA demonstrators. It measures 31″ wide X 21″ high X 5.5 deep. This would be a neat item to get running and hang on the wall with your radio collection. The item “NICE Vintage Welch Tube Radio Dynamic Demonstrator RCA Like 1950′s Breadboard” is in sale since Friday, March 11, 2016. This item is in the category “Collectibles\Radio, Phonograph, TV, Phone\Radios\Tube Radios\1950-59″. The seller is “grandpaczerniak” and is located in Cedarville, Ohio. This item can be shipped to North, South, or Latin America, to all countries in Europe, to all countries in continental Asia, to Australia, ZA, to New Zealand.