Product Overview Marchal Bulb, 45 / 40 Watt, 6 Volt, Yellow This is a 6 Volt bulb with a BA21d base. It has 2 filaments (high and low beam). The BA21d base has two contact pad at the bottom, the metal base has 3 bayonet pins. Please review the images for details. Also available in 35/35 Watt with clear glass, as well as in 12 volt, these were used in many vintage european automobiles. For additional specifications, please review the item specifics. Reviews (No reviews yet) Write a Review