I am going to measure the chamber length, bore diameter and choke to see how the measure up. Now the shotgun had all the proof marks at one time, so it was saleable at one time. If a gunsmith had to hone the bores or change the choke could this make it out of proof? Now this is Belgium made, not English, but I wonder if they had similar laws. After measuring everything and it checks out this my have to be added to the collection. Like I need another one. Pictures to follow.