Victorian Crayon Portrait in Oval Bubble Glass Frame

A Victorian-era crayon portrait depicting an elderly couple, housed in an oval wooden frame with convex 'bubble' glass. The portrait features hand-drawn charcoal or crayon enhancements over a photographic base, a common late 19th-century technique. The frame has a faux-bois finish. Condition shows some wear to the frame's finish and a cardboard backing secured with wire. Measures 21" x 15".