William Unger, or Wilhelm Unger 1837 - 1932. German etcher and engraver. Hand-colored etching depicting a 19th-century style portrait of a woman in blue. Signed W. Unger in the lower right. White mat, wooden frame. Antique Graphic Art For Collectors. Provenance: Anna Feltsman Estate. Feltsman family: Oscar Feltsman, 1921 to 2013, was a Russian composer of Jewish descent born in Odessa. He was the father of Vladimir Feltsman, born in 1952 a Russian-American classical pianist. Anna Feltsman was the first wife of Vladimir Feltsman.