I have a Fausti that I bought new at a factory visit back in (IIRC) 2021. Working with Barbara was a pleasure. They are a good family.
My understanding is Mr. Fausti (the sisters' father) worked for Beretta, and had a "better idea" to improve things. This idea was not something Beretta was interested, and so he moved down the street and opened his own shop. I drove past Beretta when visiting the factory. When he retired, his three daughters took over the company and are running it today.
I think (but do not know) that Fausti started selling guns in the US for other companies (i.e. a Cabela's gun made by Fausti) and this is a common business model in Europe. A few years ago (perhaps 2015 or so? Not sure) Fausti opened FaustiUSA as their own importer selling their own guns.
www.faustiusa.com
The Caledon is their entry model, and only offered in in O/U. I believe that sold new for about 2400 euro.
Mine is an SLX over under. If I could see the logo on the bottom of the trigger guard, I could hazard a guess at the date it was made. They changed the logo about 2021 or so because as it was "shrunk" to fit the trigger guard, it lost detail, so they came up with a simpler design.
Looking at today's offering on the website, it looks like an SLX. From what I can tell, all Faustis are box locks, but the SLX has a side plate to "appear" as a side lock. I can't find my price list right now, but figure about 3500 euro new.
It would be interesting to see the proof marks, etc. under the hand guard.
I'm biased, because the gun I have was "fit" to me, and I was blown away by how easy it was to shoot when. I finally had it. I am NOT a good shotgun shot, but it is well balanced and goes exactly where I point it.
Chokes, etc. should be available from the US importer in Fredericksburg, VA. They will also be able to tell you a lot about it.
I'll admit it, I'm a Fausti fan. A lot of that has to do with the customer service I received during the purchase process, and I'm very happy with the gun. They also travel to the US yearly, to attend SHOT, DSC, SCI, etc. They deserve to be more well known than they are.