If you have a francotte rifle the number on the barrel is 21213 can you tell me the manufacturing year?

Go to the internet site : http://pagesperso-orange.fr/mallorquina/source/page2.htm Go to " banc d' épreuve " , you will find two lists which will help you . One list shows the year of manufacturing of a Belgian firearm , by a letter , the other list shows the the letter belonging to the person (and the years he worked at the proof house of Liège ) who proofed the gun .