Thanks K9 75!
I took a dozen or so photos of the proofs but need a better camera or better light to make them clear. So far I have identified 4 Belgian proofs. I see now where the prior owner got 38-55 from there are two stamps on the water table � one is a 38 and slightly to the right is 55. He assures me that he fired 38-55 through the gun. I see no evidence of damage and the action locks up tight, so this old girl was well built.
Here are the best pics I have so far. Found a fellow selling 9.3 projectiles and bought them. Now we just need to confirm the chamber length.