Beautiful looking bows ....
'63 & '64 catalogues show belly glass ending well below the heel of the grip (as per your wenge), whikst '65 & '66 shows glass all the way to the heel (as per your rosewood).
Each of these catalogues refers to Rosewood, no mention of wenge.
The tip overlays seem to be of different length & palm-swell area of grips shaped differently.