http://www.facebook.com/photo.php?fbid=4...e=1&theater

Here is a link.

Basically, most A&D actions have a cocking limb for each lock. They project from the knuckle either side and lock into holes in the forend to form a lever and cock the gun.

This is a combination of the two, going into a single projection, which fits into the forend and cocks both locks. Similar to what Greener did with the Facile Princeps cocking arms, but his acted on a projection on the lump, not in conjunction with the forend.

www.vintageguns.co.uk