According to the parts book also with a picture, there is 4 small lens retaining springs, S6832Z. You can see there how it is shaped, but the shape is not critical as long as it fits and clamps the glass firmly. Very many old headlights have similar solutions. There is a thin cork gasket between the glass and bezel, No. S6836Z.
Foolishly enough I haven't made notes for the picture from what headlamp bezel this is, as I don't think the bullet glass does have recessions incorporated in the glass for the springs as it shows here. The picture with a measuring tape is from a 33-38 bezel.
