I am ready to load the MAC catalog and photos, the problem is, the photo hosting servers are jammed with heavy traffic at the moment. For whatever it's worth, I have owned several doubles and seen many more with the same arsenal type numbers stamped into the stock. About 1985, I bought a Belgian Vendrix and a German Griefelt boxlock that both had arsenal numbers, the dealer [Ron Peterson], explained to me that many doubles were "Drafted" into the French military for use on guard duty and military police work. He had many to choose from, and I had no reason to doubt him. Based on what Ron Peterson told me, my guess is that the MAC shown above is pre-war, even though the catalog appears to be post-war...at least printed after '45...I don't read French, so the readers who do, will have to interpret for those of us who don't...Photobucket is still jammed