I understand this is an interior light from a pre-war vehicle of the Hakone Tozan Railway, but I lack the specialized knowledge to provide further details. The metal base is 35cm in diameter and features a mesh, presumably for heat dissipation. Its construction suggests it's quite old, and while there is some age-related wear, including holes in the mesh and scratches, the glass itself appears undamaged, with no visible cracks or breaks. It may be a rather rare item. Interested parties, please inquire.