The 13-cent Skilled Hands for Independence se-tenant commemorative stamps (Scott 1717-1720) were first available on July 4, 1977, at Cincinnati, Ohio. The four commemorative stamps salute the contributions of seamstresses, blacksmiths, wheelwrights, and leatherworkers to Revolutionary War efforts. The stamps were designed by Leonard Everett Fisher, and they were printed in yellow, magenta, cyan, gray, black, and blue.
The multicolored stamp was printed on the Bureau of Engraving and Printing seven-color Andreotti gravure press (601) as sheets of two hundred subjects, tagged, perforated 11, and distributed as panes of fifty. Mr. Zip, “MAIL EARLY IN THE DAY,” electric eye markings, and six plate numbers, one in each color used to print the sheet, are printed in the selvage.
Reference: Scott 2005 Specialized Catalogue of U.S. Stamps and Covers