Buzz - correct, the 20th century H&H Royal is a simple barrel-cocked bar lock, as is the Boss, except a few self-openers (I have just taken one of them in to fix the single trigger). The Purdey and Atkin are very similar - Beesley type self-opening spring cockers. A far more complex mechanism. I'll post some more when I dig them out of the archive.

Prairie Ghost, all those locks came from Stanton.

Last edited by Small Bore; 07/25/13 04:41 AM.