Gentlemen:
My opinion is that PEDRO Arrizabalaga made very good quaility sidelock double shotguns and rifles through all the times.
Even a model 106 (basic model but with triple lock "a la Puedey", double intercepting sears and walnut stock) was made very solid and with the tight tolerances and good steels that made PA shotguns so reliable.
I have a model 132 from 1968 that my granfather bought in Eibar more than 40 years ago. The shotgun still have the characteristic sound when you close it: solid, tight close, dificult for me to explain, but unique for PA shotguns.
I think that ANY Pedro Arrizabalaga shotgun is a good shotgun: I never saw a bad quality one.
As I told you first, just my opinion.
Regards,