George D. Mercer, 88, a graphic artist who retired from the U.S. Postal Service in the mid-1980s, died Aug. 8 at Halquist Memorial Inpatient Center in Arlington County.

He had Parkinson’s dementia and a subdural hematoma, his niece Annette Moore said.

Mr. Mercer, a Washington resident, had worked for the Postal Service and the old Post Office Department as an artist and stamp designer for about 16 years. He previously did graphic design work for the Navy, Vitro Engineering Corp. and the Afro-American newspaper in Baltimore.

He designed embossed envelopes and stamps, including the 15-cent “Uncle Sam” stamped envelope released in 1978 and the 12-cent Freedom of Conscience “Torch” stamp released in 1981. He received several artistic awards and was twice invited to paint the portrait of the U.S. postmaster general.

George Daniel Mercer was born in Slidell, La., and he moved to Washington as a boy. He was a 1941 graduate of Dunbar High School, and he served in the Army during World War II.

His first wife, Anita Sims Mercer, died in 1994 after 46 years of marriage. His second wife, Isabell Layman Gordon Mercer, died in 2007 after eight years of marriage.

He had no immediate survivors.

— Megan McDonough