This is case #1-35, 'Alone at the Rendezvous, in Nineteenth Century Photographic Cases and Wall Frames, by Paul Berg. The book lists it as Common.
This is case #31, 'Alone at the Rendevous,' in Union Cases, by Krainik, Krainik, and Walvoord. The book lists it as Available.
From Union Cases: "This romantic vignette is based on a mezzotint by the eminent Philadelphia engraver John Sartain (1808-1897) from a painting by Alfred deDreux. The scene shows a young woman on horseback awaiting the arrival of her lover. His figure can be seen in the distance, coming down the forest lane."
SIZE. Quarter plate.
COLOR. Brown.
CONDITION. This case needs a velvet pad for one side and a liner for the other, or liners for both sides. Corners and edges are all good and sharp. The short rails each have stress cracks. Clasps still work, but a little sticky.