Interesting markings. Compressed Steel with an eagle belonged to Joseph Cape. I have seen his barrels on other Forgeron guns. If I am not mistaken the date code is for 1935.
I can not find anything on the patent holder, Charles Leve in any of my usual Belgian or French sources.
However, I did find the patent. It relates to new type of extractor / ejector. Leve was from Cannes, France. He filed a protective patent in the USA.
http://www.google.com/patents?id=c4tPAAA...;q=&f=falseHe also filed his patents in France, Germany, Denmark and Belgium.
http://v3.espacenet.com/publicationDetai...36804E&KC=Ehttp://v3.espacenet.com/publicationDetai...14937A&KC=APete