This button was found by a friend at a early house site were lots of flat buttons as well as Civil War buttons from both sides. It is very well made, thick, one piece button similar to size and construction to the early one piece eagle coat buttons. The backmark is: FIRMIN&SONS Conduit St London. Thanks for any help you can give us in IDing and dating this button. Thanks for the help guys, guess since we have a date and it is a livery button I should mark this one solved.