The Purdey " spring I was talking about is a very unique and complex spring. It has a very small "roller" made on to it. The Henry Atkin "Spring Opener" is said to be an exact but better version of the Purdey self opener. If I had another issue that involved a similar spring I would send it up to G&H as they are a Purdey dealer here in the US and have the people to repair most anything on a Purdey.
I could have sent the Atkin to them as they quoted me a price. Mr. Hutten was slightly less and had a much more interesting story behind him. He was a true gentleman and a joy to talk with.
Now I may bash on English guns and "Best" guns but to tell the truth, there is something about a fine English Best shotgun. They have a "soul" that most other shotguns do not have.