I inherited a Fox Sterlingworth made in Philadelphia from my father a few years ago.It has 2 ivory? beads on the rib,28 inch barrels, I believe full&mod choke. The Barrels look new inside&out, How can you determine if a gun has been reblued? Also it has about 85% of the case hardening and the lever is well to the right of center. There is a couple of small marks on the forearm & a couple tiny scratches on the outside of the trigger guard. The checkering is there but feels pretty smooth to me.Im thinking that This gun was reworked but I dont know for sure.The S# is 108420. Can anyone clue me in? Thanks, Gunder