signed ‘yu [in Chinese]’ along bottom edge

a set of three etchings in an editioned book

each etching 19.3 x 14.8 cm. (7 5/8 x 5 7/8 in.)
book 33 x 25.5 x 1.2 cm. (13 x 10 x 1/2 in.)

Executed in 1930, this work is number 181 from an edition of 306.