On a 1973 VW beetle Where is the timing mark?

the tdc is a slight notch on the crank pulley you should have two other notches toward pass. side of car on the backside of the pulley all along the circumference of it . the first notch should be 5deg the second 7.5 deg you may have to clean the grime off the pulley two find them once found use a white or yellow crayon or paint to mark them for easier location when timing.