Yes, the modified part has the serial number given it’s on the underside near the pivot. As said I could get the pin out and I removed it thinking like Danny why not switch the levers. When I turned it over and saw the serial number I thought this kind of messes with this theory? Yes it’s very hard to see when attached but why mess with matching serial numbers on both pistols? Especially since this part works well and actually looks good and has grown on me as a collector? This part has kind of become part of my collecting journey. I bet this pistol retains most of its original finish because it was broken and probably not used much by the original owner?