Originally Posted By: eightbore
Thank you Smallbore. Cliff, it would be useful if you would clarify which gun in your picture is which and what feature you are attemptingo to illustrate.


Top picture : Purdey Woodward with conventional hook that rotates on fixed hinge pins in the action

Bottom picture: Boss with triangular wedge that drops down into a rotating set of trunions that established the hinge

Both marvels of gun design

-Clif Watkins