The Postal Service issued its nondenominated Make-Up Rate stamp on January 22, 1991, in Washington, DC. One of these stamps, plus twenty-five cents of additional postage, equaled the F-stamp rate. It could be used only in conjunction with other denominated or letter-rate stamps because it did not contain the phosphorous ink necessary for processing on Postal Service automated cancellation equipment.
The stamp was designed by Dick Sheaff and printed on an offset press by the American Bank Note Company.
Postal Bulletin (February 7, 1991).