What do these stamped symbols mean?

[Usertag]

What do these stamped symbols mean? It's on a Spanish L.I.G Double Barrel.

 

[ohen cepel]

European proof marks. Could mean the nations it was allowed to be sold in, modern powder, etc. If you google proof mark you should be able to match them up. Bit hard to read them well from the pic.

 

[mapsjanhere]

the crest with the X is the mark of the Eibar proof house, the crossed guns are the final proof for shot guns. Top one probably the date, not sure about the bottom one.

 

[JohnKSa]

The bottom mark on the right side (shield with BP and an oval in it) is an optional Spanish smokeless proofmark for shotguns. Used since 1931.

What are the letters on the upper left side? I can't tell if they are R. P. or P. P.

Either way, I don't know what they would stand for...