Armour Hog Wheel Chicago Stockyards Swinton Oregon Advertising Postcard

Antique advertising postcard showing the Revolving Hog Wheel at the Armour Plant in the Union Stock Yards, Chicago. The caption across the machinery reads: “Round goes the wheel to the music of the squeal.” The postcard also promotes Swinton, a Portland, Oregon real-estate development, with advertising for the Columbia Trust Company, 7th Floor Couch Building, Portland, Oregon printed on the reverse. Published by V. O. Hammon Publishing Co., Chicago, card number 658.