I have an Italian 16 ga. hammer gun I believe was made between the wars that was proofed with Walsrode smokeless powder, and so stamped on the barrel flats and action flats. It then goes on to state on the top of the barrels that they were "proved in the manner of white powder" (my italian friend's best translation). An interesting mix of english and italian language on the gun. I'm not sure if Walsrode was english or german in origin.
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