Well I just made my new gloves from scratch, the process of doing so made me realize a couple of things. First they must have made the gloves to Prowse’s specific measurements, so for anyone else to look the same I guess they should be done to fit.
Also Not everyone has the same proportions, for example , I have very long forearms so my cuffs are longer than what I found as reference.
Yes I believe the fingers must be tapered and have angled fourchettes (pieces between fingers) to properly fit the hand perfectly, Other wise they would look very loose like ski gloves or welder gloves, and I’m pretty sure Prowse had big thick weight lifting hands.
The padding on the back hand , they are 6 rectangles, the 4 in the middle somewhere between 3/4” and 1” wide, the outer 2 about 1/2”, but they are not exactly rectangular because once after the wrist the pattern must widen to fit the diameter of the arm, then the tapered “wing” of the cuff is about 2 1/4” wider than you arm. Those 2” is where the “Y” pattern is drawn and are about 1” wide. So in the back of your hand the rectangles may be 3/4” but one on your forearm they might be 1”.
One more thing, the gusset must be between 2”-3” (I have to correct mine a little)
I’ll try to upload some additional reference photos as well as the template I made for mine. It was a long process of measuring each finger and and add and subtract sewing seams and tolerances.