Its a Spanish side lock made during that period of time when the problems of poorly finished and unhardened parts seemed to be endemic to the industry.
Just about any of the Spanish shotgun service centers that operated during that era had to make the same sets of repairs.
Im guessing that the first gunsmith that pops the locks off Saw some parts that were peening , or were bent, both of which were problems people that had Spanish shotguns in the 1980s faced frequently.
Fixing this one isnt going to require rocket science.
Its never going to be a high volume target gun, too delicate. Just make it work, and use it when you feel the urge.
