I have an O/U that is marked "Laurona/Eibar." I just had the frame blacked, and the gunsmith who took it apart seemed impressed. It has double single triggers (which I can't believe aren't more popular), and he said it came apart easier than many other boxlocks. I guess the trigger assembly slid apart from the receiver as a unit. He also said the springs were captive, making assembly easier.
CHAZ