3-pin bayonet fitting twin filament headlamp bulb, as originally fitted to many french vehicles of the 40s/50s/60s.
6 volt. 45/40W = 45 watt main beam / 40 watt dipped beam.
If this isn’t exactly what you are looking for, we have other 3-pin bayonet bulbs available with yellow or clear glass and 6 or 12 volt, so please look through “Related Products” for other options.