Sakari-
Welcome to NitroExpress!
Please post some images of that rifle.

I own two sixteen bore double rifles, and have considered buying one Rodda 16b double rifle which was for sale here on the west coast of the US.

I might be able to dig up some records on that particular gun, it was a highly ornate centerfire gun, cased with ivory handled tools.

Mehul, while on the chase for that Rodda I stumbled upon my Tolley. The Tolley is partially responsible for derailing my efforts to get the Rodda.

--Tinker