I an looking for a Nipple Key for my cased Jefferies of Norwich percussion 150 bore (31 calibre) five shot revolver, which currently has an incorrect key in the case, which is also broken.
The key needs to be around 14 to 15 cm total length with a 1/4" square to fit the early British small square nipples.
Any suggestions would be a great help as to where I might obtain either an original or a good reproduction.