On the shotgun argument, there are guns still made in Birmingham that would equal Purdy, it's only when Purdy were taken over by some luxury goods company that their prices went stellar.
Purdeys I believe bought the system and employed him to run them, got him to train a guy up and them sacked him, as the story goes.
Not that expensive compared to a new gun Tigler and depends where you go.
Westleys have the mainsprings made in India, cleaned up, hardened, pulled up and fitted over here.
Used to do the work for anyone who was anyone in the trade being one of two people still alive with the know how. I can say that as i am no longer under contract.
While on the subject, some of the best guns ever made were made in Brum!