I have an old Belgian made parlor rifle in a Flobert chambering. My father had this rifle for probably 50 years sitting without use in an attic. He said his cousin found it in a house he bought and gave it to him. He didn't know anything more than that.
The rifle is marked "Belgium" and FL 6 m.c. with a proof marking. So I am thinking it is chambered in 6mm Flobert, although the barrel looks a little smaller than .22 to my eyes. Maybe it's an illusion since I don't see any rifling.
My internet research has led me to believe that 6mm Flobert is the same thing as .22 BB Cap and .22 CB Cap. Can anyone verify this? I'd like to shoot this thing as I have been looking at it since I was a little kid. It is in good condition for a 120+ year old cheaply made rifle.