This listing is for a vintage paper advertisement. This is a 1943 ad for a RCA 3-inch Cathode Ray Oscilloscope No. 155-C! The size of the ad is approximately 8.5x11inches. The caption for this ad is 'The new 3-inch Cathode Ray Oscilloscope No. 155-c' The ad is in great condition. This vintage ad would look great framed and displayed! Add it to your collection today!