This listing is for a vintage paper advertisement. This is a 1966 ad for a Hewlett-Packard Sanborn 7701A Single-Channel Oscillograph Model 321 and 322! The size of the ad is approximately 5x11inches. The caption for this ad is 'These portable oscillographs will save you valuable lab/field time' The ad is in great condition. This vintage ad would look great framed and displayed! Add it to your collection today!