Not all that much to add, actually - except that the commercial small-action Francotte had a permanent takedown lever where a rotation of 180 degrees allowed you to remove the innards, without having to get out a pin or whatever. Works with eccentrics, and is quite handy, actually. Francotte actually patented quite a few takedown mechanisms, most of them being used on the small actions. The large actions usually had a simple pin with retaining screw.

Last edited by martinibelgian; 11/13/09 04:10 PM.