I believe most makers worked hard to earn a Royal seal from someone if not the King then a Earl or Duke,whatever. If Purdey had a Royal seal from the King and the gun was built by Scott I'm sure Scott whould have let the world know. There were a few great lock makers and I would have no problem findeing their locks on a best from another company. I know more than a few folks purchased Whitworth Tubes from BSA to finish and use in their guns.