I've owned this 1893 4 3/4" SAA for a few years and have always wondered about some file marks on the gun. They seem intentional, but they don't make any sense. If anyone has any ideas or speculations, I'd like to hear them. There are three short marks and one long mark under the trigger guard, one short one on the heel, and two very short ones on the back strap. Thank you for any thoughts.