It's a 12gauge, sidelock, extractors, etc.
It says Army & Navy CSL London and has a number in the stock: 43206.

It is possible to know the year or the gunsmith or something??

A friend of mine bought it yesterday in 360 dollars

I know there are double rifles with the same name but I don't know nothing about shotguns.

Any info about this company is welcome.

L

Lorenzo,
Army Navy was a retailer that did not make their own guns, much like Charles Daly. They bought guns from a number of gunsmiths and sold them. They are generally very good guns and $300 would normally be a great buy depending on the condition of course.

I have never seen any information on their guns relative to year of manufacture or who actually built them.

Lorenzo, The University of Glasgow(Scotland) has all the archival records from Army&Navy. I believe the fee is about $45 us. to get them to research and send you the history on the gun. Sounds like your friend got a Steal !!

Thanks to both of you gentlemen !!!
I will do a little search for her history !!
Again, thank you very much
L