Unknown 19th Century German Artist: Nude Ephebe with Flute (Nude Boy With Flute)

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I took this nice 19th century Academic study of a nude boy at auction in Germany this weekend. The auction house describes a second drawing in the lot as a drawing of a "nude girl" but did not post a photograph of the entire lot so we will have to wait until the two drawings arrive to see the second drawing. Apparently the drawings are not signed but are from a late 19th century.
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