Thanks, Johnny. I was able to swap the Germanicon "copy" back and got one without no part number or other markings with patina to prove it's age. It had a natural finish like yours (the German version was black -- mag parked?). I believe that a true USGI rear sight removal tool will not be marked by machine stamping. I think the use of an electric pencil is consistent with that assessment being likely done by hand by an armorer. Congratulations on your original tool!