One of eighty-six early incandescent lamps. Single loop filament, no loop supports. Cemented joints to leads passing through single glass stem. Round clear bulb with short nexk. Top pip. Cyclindrical Brass base, oversize for neck of lamp, attached by plaster, with projecting brass pin and spring off centre. Lamp is brass turning, with female thread at bottom containing loose wooden insert with brass contact plate, held and positioned by single lug fitting dimple on lamp base, (similar to those used on bayonet cap). Swan United Electric Light Co. Ltd. etched on bulb. No ratings marked (probably 20 c.p. - that was standard). Date must be 1882 or 1883. Swan United Electric Light Co. Ltd incandescent lamp
