Just as a small note, there are absolutely no marks on a single bow found from throughout history. That includes the early Viking war bows such as the Balinderry Bow and Hedeby bow, the hunting bow of the Meare Heath and right up to the elite peak-performance warbows of the Mary Rose, encompassing the Nydam bows, Holmgaard and Mollegabet bows and Otzis bow. Not a single one of them show any signs of marking on either limb.
As somebody said earlier in the thread, there is also no evidence within period artwork from European culture of bands or marks being used on bows for war or hunting, despite the incredible accuracy and detail included in many pieces of art. They depict horn nocks, string serving, fletching inserts, tapered shafts, accurate typology of arrow heads and yet no markings or bands on bow limbs. Seems fair to assume that they're a very modern introduction.
There are archers today who have never used a rubber band or ground markers to be able to hit what they're aiming at, so there's no reason that archers in history would have needed them or thought of using them.
Pockets are very useful for keeping stuff in and we couldn't imagine life without them today, but they weren't around in medieval times either. You can't argue a point about historical context based purely on common sense in a modern mindset.