I have seen that list of stamps indicating Belgian Gun Dates of Manufacture, but it seems there are plenty of Belgian guns that do not utilize those date codes. Here are a couple Louis Christophe barrel flats that do not fit the mold. The first image is from my Louis Christophe/Jules Bury .450 BPE double rifle, and the second is from a Louis Christophe/Jean Duchateau 12 ga. shotgun. Louis Christophe was a Brussels sporting goods retailer that apparently did not reopen after WWII

I assume you meant to ask if your 28 ga. gun was proofed for Smokeless or BLACK powder. That information would be given in the proof stamps on the barrels, and a quick Google search will provide pictures of those Belgian proof marks.


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