In Vic Venters book he does an article on the Westley Richards trigger.

The "Hunter One" I think it is and Dewey Vicknair is pictured as being one of the smiths who will repair them.

"Reliable until messed with" seems to be the general comment.

In the same book he does an article on a gunmaker Turner who built single triggers for Westley (??? or was it purdey???) well enough to impress them into ordering more.

Perhaps if a maker won't build you a gun with one then they haven't got a "maker to the trade" that is doing one that they'd put their name on !!??