Very well said Chops.My research continues and Treblig may be onto something, with mention of German influence.History does record the migration of German gunsmiths to Italy, Belgium, Scotland and then the walk south to London.So it is reasonable to suspect Germanic infuences on breech bolting mechanismns.The rectangular breech bolting system similar to the Greener bolt is known as the Kerstan bolt as featured on Beretta SO's. This was a German invention I believe.