Authentic Edo period original, c.1836, Japanese erotic art shunga woodblock print picture by Keisai EISEN (1790-1848).  From the shunga series, Konote gashiwa (Two Aspects of Love/ Child’s-hand Oak).  Shunga picture measures 22.5 cm x 28.2 cm.  Very good colors and impressions, as well as deluxe printing techniques used such as mica (metallic pigments) and gauffrage.  Condition is good with some wear & soiling.  No backing.  Please see and judge from photos.
 
"An attentive courtesan (a hairpin rakishly between her teeth) inspects her surrounding while her client prepares for penetration." excerpt by Ofer Shagan from Japanese Erotic Art: The Hidden World of Shunga.