Sir Sinclair is a 17 H, modern-type approved Dutch Warmblod stallion.
In 2005, he won the USEF/Markel Young Horse Dressage National Championship for six-year old dressage horses under Belinda
Nairrn-Wertman. At his stallion testing in Ermelo in 2002, he received scores of an 8 for his Walk, a 9 for his
trot, and 8 for his Canter, and an 8.5 for Suitability as a Dressage Horse. His sire, Lord Sinclair, won his 100 Day Test in 1999 at Neustadt/Dosse
scoring a perfect 10 in Character, Ability to Work, and Rideability.
Sir Sinclair's dam is Krishna (ster, sport) is by the
Preferent Dutch Warmblood stallion named Flemmingh.