Check out this thread to help yourself out with proofmarks
(click here).
This was made during
or after 1893 as proof by the E LG over the star in the crowned oval. It also bears the Liege proof of blackpowder testing for a breech loading firearm which is the stylized 'EL'.
The Lion over P.V is a semi smokeless proof.
Not to be confused with modern smokeless.
'Choke 18.3' is the degree of choke.
Star over T is likely the inspectors mark. Currently can't ID it myself.
C with 12-65 inside is the gauge.
The phallic looking object in the middle of the barrels is likely the Belgian view 'Perron' mark and is worn down.
Hope that is of some help.