16x8x8 A maritime masthead lantern, Pattern 25A, manufactured by the Birmingham Engineering Company Ltd. The lantern is constructed with a D-shaped steel body featuring a flat rear access door and a curved front face. The front houses a clear glass Fresnel-style wrap-around lens. The unit includes several brass components, specifically the identifying plaques, hinges, latches, and a substantial bail handle. The handle is topped with a cylindrical brass socket and an embossed cap. A rectangular brass plaque mounted above the lens reads MASTHEAD PATT. 25A. An oval brass plaque located at the base of the front face is embossed with the text BIRMINGHAM ENGINEERING COMPANY LTD. 63 PERSHORE STREET BIRMINGHAM 5. The round brass cap on the top handle is embossed with the letters BEC within an oval border. The rear of the lantern features a hinged door with a circular pull ring for access to the interior.