A vintage trademark for Piggly Wiggly "self service" stores. At the company's zenith in 1932, there were two thousand six hundred and sixty. However, hostile takeovers resulted in several locations being divested. Today, Piggly Wiggly is headquartered in Keene, New Hampshire and oversees the operation of stores in seventeen states.
Graphic from http://www.pigglywiggly.com

Above and below are vintage views of Piggly Wiggly Store Number One, which was located in Memphis, Tennessee.
Photo from Library of Congress

Although it may not look like much today, Piggly Wiggly stores such as this revolutionized the food retail industry in the early 20th century.
Photo from Library of Congress