Link to the Image Source
Metropolitan Museum of Art

Artwork Details 

Title: Portrait of a Gentleman
Dated: ca. 1810
Medium: Watercolor on ivory in gilded copper alloy locket; hair reserve verso
Dimensions: 2 3/4 x 2 3/16 in. (7 x 5.6 cm)
Location: Metropolitan Museum of Art
City, State: New York, NY