I believe this lovely little wooden box/frame would have been carried in a pocket, keeping a photograph of a sweetheart close to one's heart. The top swivels on a nail to open, and closes along the angled edge--and is now just waiting for the image of a dear one to be complete again!
Good condition, with a tiny bit of warping to the wood; it still swivels smoothy but is a hair off flush when closed. 3 3/4" l x 2 1/4" w x 3/8" d.