Originally Posted By: obsessed-with-doubles
Sidelock:

http://www.gunsinternational.com/popup.c...4487621E020.jpg

One screw for the trigger plate.

Boxlock:

http://www.gunsinternational.com/popup.c...69CDDA3C897.jpg

One screw for the trigger plate. One screw for the bottom plate.

Position of triggers is another give away.

OWD



There are designs out there that use a variety of screw placements-The Cogswell and Harrison "Huntic" model has four screws in the trigger plate/bottom plate area, yet it is a sidelock ejector. The "Victor" model, also a sidelock ejector, typically has three screws. Unless you are actually familiar with a specific design, parroting some off-hand rule like "this one is a sidelock because it has only one screw" might leave one holding the bag, so to speak.

Best,
Ted