After looking closer I found a marking 1g111 below was 36gGBP it was underlined and below the line is st m G

I used small case letters & caps as they were marked on the rifle barrel.

I also found nitro on the shotgun barrels.

On one of the shotgun barrels I found FLUSSSTAHL - KRUPP The first word may be misspelled as the markings are very light.

I am a novice at IDing markings.