I have a reprint of a 1930 Francotte catalog from Gunnerman Press. It shows 12 sidelocks and no model numbers or names. There are no guns showing that have the same engraving as yours altho one is similar. I have been told that Francotte did not assign model names as each gun was a special order. There is a similar gun on one of the gun sales websites, but the engraving is slightly different. There are some members who post here that will have more info. Good Luck!