Hello, I found this site while researching an old family heirloom. Lots of information here! I have a SxS 16 double that I was told was made in Belgium and was described as a "Hardware store gun". Well, doing a bit of research I find that it is probably French and was made in St. Eitinnes. I also found it has 2 1/2 inch chambers, marked 65 on the barrel flats. I have sadly only fired 2 3/4 in it in the past, it was all that was available. I will try to post pictures. Can anyone tell me more about it? Thanks.