"A specially marked U.S. currency was introduced into Hawaii in July 1942, as aneconomic defense against a possible Japanese occupation. The notes were overprinted "HAWAII" horizontally on the back and vertically at each end of the face. Only the overprinted notes were allowed in Hawaii after Aug. 14, 1942, except in rare instances approved by the Governor of Hawaii. All of the Hawaii notes carry the brown seals and serial numbers and signed by Julian-MorgenthauThe $20 Notes were issused in 1934 and 1934A