Thanks, Stanton.
The gunsmith was referring that these barrels have better quality than those of current shotguns. I wanted to know more information about the shotgun and wrote to Grulla giving them the serial number. Its current owner, Iñigo Usubiaga, replied to my sadness:
We do not have information on this model, as it is a very old model.
It is a model that nowadays is no longer manufactured, with boxlock type receiver, 28 caliber, 65mm chamber and 8 tenths chokes.
Sorry for not being able to give you more information.
Best regards
Iñigo Usobiaga
The surprising thing is that the gunsmith told me that I can shoot 28/70 cartridges without any problem... and it is true!
Also, I asked him if the H.A. initials seen on the left barrel belong to the barrel maker. He did not answer me. 😕
