This listing is for a vintage paper advertisement. This is a 1950 ad for a Sylvania Marker Generator Type 501, Oscilloscope Type 400, Sweep Signal Generator Type 500! The size of the ad is approximately 8.5x11inches. The caption for this ad is 'Set a new mark in TV Set service' The ad is in great condition. This vintage ad would look great framed and displayed! Add it to your collection today!