42,,, Welcome to the forum.... They reproduce this ring so well now... The line inside [behind skull] many will say immediately 'its a casting mark ,no good'... BUT, it could be a fault from the press.. I see things I like,,and a couple I don't like..

First,,,,,Try and post a good photo of the hallmarks from inside band... Early patterns of this ring had a Ln mark at the end of the hallmark line. That was a early mark that meant the ring was finely finished.
Even with wear the Ln should be pretty clear as its below the band surface.. The counterfeiters find a real nice example and copy it so its not so easy to determine anymore..