This 1981 QSL is from KH3AB, operating from Box 4, Johnson Island, APO S.F., California 96305. 

Johnston Atoll is an unincorporated territory of the United States, under the jurisdiction of the United States Air Force. The island is now closed to public entry, has no permanent residents and limited access for management needs is only granted by letter of authorization from the USAF. 

The operator was William (Bill) R. Morris, NR4K, ex-W3YUH, WB0BIH, KA6HIQ, KA6HIQ/KH3, KH3AB
MSGT, U.S. Army, Vietnam veteran; Silent Key (1939 - 2003). Courtesy of K8CX. 

This card confirms our CW contact of March 1,1981 on 20 meters. The QSL card is in excellent condition.

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Questions? Let me know and I will answer ASAP.

Thank you for looking. 73/Rich, WX9X