You may be able to tell who made it from the stamp on the watertable or barrel flat

See: http://personales.jet.es/rafa/b_punzones_larga_lisa.html

the year of production marks are at: http://web.jet.es/rafa/b_punzones_eibar_fecha.html

From what I've seen its a standard Eibar, Spain, boxlock. No idea of the quality but the ones I've seen on the internet are simple, basic guns.