Etching 'Boats in the Spree forest' - Ernst Oppler

An original etching by the German painter and graphic artist Ernst Oppler (born 1897 in Hannover - died 1929 in Berlin). Boats in the Berlin Spree forest - not dated, presumably around 1920. On China paper, with normal ageing traces (browned). Size 4.9' x 6.9' (etching), 6.9' x 9.3' (sheet). Number 46 of an edition of 50. With pencil signature.