I've got an Uggie boxlock. I think the code translates to 1972, and while I have no idea where it spent it's first 30 seasons, it was used hard by somebody.
I've been busy getting the stock to fit me, and have fired a bunch of ammunition at clay targets and web paper roll ends to look at patterns, and can report nary a problem. Hell, I've been looking for problems and I can't find any. It has a Spanish "look" about it, but, has a well fitted hidden third fastener, and double underbites.
I really like disc set strikers, and had a spare set made and bought a tool. I'm already one up on a hunting buddie's Webley 700 that ate an integral hammer/striker on the first shot of pheasant season, even though it cost 10 times what my Uggie did. The Uggie was a lot of gun for $400.

Best,
Ted