Just got a very (what I assume) rare Breguet 18k gold 1/4 repeater (De La Marina Royale). What is best about the watch is it comes with the original case and hand signed papers from Breguet himself dated 1822. There is also another paper dated 1854 (looks like a service maybe?) signed by a "Jo Breguet" Joseph? It also has the original spare bulls eye crystal. Just wanted to get some opinions on it and maybe any idea of the value.