follyfancier - 5p coins used to be much bigger, the size of an old shilling. They became smaller in the 1990's, as did 10's and 50ps. I work in a Post Office and would take old 5ps (or 10ps or 50ps) and change them for face value. Couldn't really do that with thrupny bits though. Maybe you could just sell them as a job lot on e-bay.