Product Overview Marchal Bulb, 45 / 40 Watt, 6 Volt 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 and yellow, 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