Dunn saddle  

maybe you can google it. maybe you can ask a technician. maybe you can ask your local gov. maybe you can ask the manufacturer. maybe you can ask local dealer.

From what your describing, I'm assuming that this saddle is an antique, because the US Horse Calvalry hasn't had any combat duty since the turn of the 20th century. I'm wondering if the saddle has a full seat, or is an "open" seat, meaning is there a hole in the middle of the saddle seat. The full seat saddles were commonly used by officers of the US Calvalry, while the open seat saddles, being cheaper to make, were for the enlisted men. An officer's saddle would be considered more valuable, considerably more so if the history of the saddle is known (i.e. officer's name, unit, military campaigns participated in, etc.). There are groups who collect these types of tack, and value is mainly based upon what the collector is willing to pay for it versus what the owner is willing to sell it for. Although I do not collect such things myself, I have not heard of these types of saddles selling for over $1000 (USD).