mark. this is not a real oberndorf square bridge as westley would often ,and mostly use military actions for there guns the bolt handle was probably altered in england as they tend to do some funky things ,ive had a few of these in fact i let go of a nice one last year with the original scope and westley patent mounts all numbered to the gun if you email simon clode at westlys in england he may be able to shed some more info for you , champlin arms has a 7x57 on his site right now that is built on a oberndorf as not many were ,personally i admire what westley had to go thru to make a military action look and act nice as rigby mostly used oberndorfs and they needed nothing ...paul