congratulations on your find, Lloyd. I have two Gladiator Tournament grades, the latter SN 38453. According to the records only 51 guns were made in 12 gauge and 10 in 16 gauge. However, I think there were more than 51 manufactured in 12 gauge. When I requested a letter for SN 38453 Dr. Jim informed me that the records show that it is a Fulton box lock. I would request a letter to find out if it is the same situation with your gun. Still aren't find as there aren't many out there. Tom