100 Dollars MasterCard Travelers Cheque

Thomas Cook's traveler's cheque operation in the United States was run through Thomas Cook Inc. as a separate entity from its British parent, reflecting the competitive American market dominated by American Express. By 1980, Cook held a respectable but secondary position in U.S. cheque issuance, and the MasterCard co-branding on this series was a deliberate attempt to leverage an established payment network for point-of-sale recognition — particularly useful in regions where the Thomas Cook name carried less weight than it did in Europe.

The microtext security line was a relatively recent adoption in cheque printing by this period. Refund fraud, not counterfeiting, was the dominant abuse vector for traveler's cheques throughout the late 1970s.