Input (grade 8): The earliest saddles were simple pads attached with a surcingle seen by 800 BC, with the saddle tree coming into use circa 200 BC, and paired stirrups by 302 AD. Saddles in the styles seen today date back to the 18th and 19th centuries.
Output (grade 7): The earliest saddles were simple pads fixed with a surcingle seen by 800 BC, with the saddle tree coming into use about 200 BC, and paired stirrups by 322 A.D. Saddles in use today, date back to the 1700's.