Proof/Maker Marks

[Fez]

Can anyone tell me what these barrel marks mean?

It’s a 1974 Pedersoli SXS 12 gauge.

Other than that I can’t figure out what the other marks mean. Are they choke markings or proofs?

Thanks for any advice,
Fez

 

[64Springer]

There are websites that show what all of those Italian stampings are.

18.2 is bore size in mm.

18.2 x .0393 = .715 or 12ga.

 

[chorizo]

https://civilwartalk.com/threads/italian-proof-date-codes.201078/
http://www.shotguns.se/html/italy.html

 

[Britsmoothy]

Looks to be mod chocked in the left barrel. As stated by 64springer. 18.2 is bore diameter when new.
Proof marks and inspection marks.
A service or proof pressure in kgcm .
The choked barrel if we are correct maybe around .695" at the muzzle.