I am researching a Colt DA 38 for a widow friend of mine,she wishes to sell the gun and is interested in its worth. Seria lnumber is 5757 with RAC stamped above the grip on left side. K5757 is stamped on the cylinder release. It has a lanyard ring in the base. Bluing is good. There is the number 31 stamped into the left grip above the mounting screw. There is something else stamped on the left frame above the trigger but I cannot make it out. I amnew to the forum and any help would be appreciated. Thank you.