Zhang Dazhuang 1903-1980; Ma Heng 1881-1955, Bird and lotus; calligraphy in seal script, 1947. Estimate  5,000 — 8,000 USD. Photo Sotheby's.

Painting signed Zhang Dazhuang, dated dinghai (1947), the seventh lunar month, with a dedication and one seal of the artist, da zhuang. Calligraphy signed Yin Ma Heng, with one seal of the artist, ma heng, ink and color on paper, folding fan; 26 by 54.5 cm. 10 1/8  by 21 1/4  i; 

Sotheby's. Fine Classical Chinese Paintings & Calligraphy New York, 17 sept. 2015