German/Continental locks will generally have separate pans.
The commoner styles of German locks, exported to America are flat faced, usually, but not always, with file slashes across the tail. Usually without bridles, but on occasion, with them, more so towards the end of the 18th century. GENERALLY, the frizzen springs are mounted with a screw from inside the plate, so you can't see a screw. It's rare to see a German round faced lock on an American gun, but there are a few.
English locks, commonly seen on American guns look kind of the same, flat and round. Just one has a flat lockplate and cock, the other has a rounded lockplate and cock. Pans are usually both rounded. Frizzen springs are GENERALLY mounted with a visible screw from the outside. There are other styles of English locks. The nicer round locks have big, swoopy pans with bridles.
A Prussian musket lock:
A couple of German locks:
A couple of English round locks: