Art Noveau Pewter object Thuribule/Incense? "Lovers in a Garden" hiding space

* Ornate Art Noveau antique pewter piece. * Image is of lovers in a garden * Possibly a thurible, or a place to hide mementos from a lover, a letter, a lock of hair * Hiding space once open see photos * Purchased at an estate sale in the U.K. * Measurements approx. 7½" H and 4" wide. It weighs approximately 1 pound, 2 ounces. * Unique Valentines Day gift.