Magnifying glass and marquetry framing

Old wooden frame. Top in magnifying glass (elm can be) and inner border in wood marquetry. It consists of 2 plates assembled in the center and fixed on a wooden support, all measuring 16 mm thick. The view is oval and protected by an old glass. Exterior 19 X 24 cm. Oval 14 X 19 cm. Cardboard back with 6 fixed brass back. Brass suspension ring.