This is a Simco Arabian Working Saddle, sells for at least $1000 new and this one is just broken in, with the padded suede seat, silver conchos, in Walnut brown. It is about 7 years old, maybe made back when the quality was better. Size 15.5. details below...Product Summary:
Simco Working Arabian Western Saddle

Made to fit an Arabian and other breeds, working or pleasure horse, this saddles features an Arabian round skirt, a quilted suede seat and engraved silver conchos.

Saddle Specs--approx.

Made of Leather
Round Skirt
4 3/4" adjustable length Stirrupsl
2-tongue Stirrup Buckles
Quilted Suede Seat
Engraved Silver Conchos