I believe this to be a 16 seat. This is either a very early saddle or the rivets have been replaced with non Hermes Rivets. The saddle is in fair vintage condition, plenty broken into. The saddle does have missing stitches and shows wear.
I don't know much about saddles or riding. I think this would be mostly good as a decorative piece. All appears to be intact with exception of the missing rivet on the front. Overall it's a very well love and used saddle with great bones and plenty of life left.
The leather is nice but shows sign of use and age. The item "Vintage HERMES Paris Leather Horse Saddle Jumping Riding Equestrian 16 H250" is in sale since Thursday, July 26, 2018. This item is in the category "Sporting Goods\Outdoor Sports\Equestrian\English Saddles & Tack\Saddles". The seller is "parkavecellar" and is located in Dallas, Texas. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion.