Genuine Lucas 6v 5 Watt BA15S type Headlamp Pilot Bulb (or single filament small headlight bulb, or indicator bulb). As fitted to many Norton single cylinder models using Lucas (or proprietary) electrical lighting systems from the 1930's - 1960's. Price is Each
This is a single filament 6 volt bulb, often used as a headlamp pilot light, or possibly the main bulb in a small capacity motorcycle, or early 6v indicators. The diameter of the metal part of the buib (i.e. where it fits into the headlight bayonet) is - 15mm, and the bayonet prongs are parallel.
We can supply by special order both 12 volt and high lumonisty modern 6v LED bulbs from Lucas as well. Enquire for details and price - email email@example.com