In 2009, the Duke of Kent's children sold the chair he used in 1937. Here is an excerpt from Christie's press release (a picture is in the link):

A leading furniture highlight is HRH The Prince George, Duke of Kent’s chair and stool from the coronation of his brother, HM King George VI in 1937. Covered in red silk, and woven with the Royal coat of arms, it is estimated to realise £15,000 to £30,000. It is a rare occurrence for these chairs to appear at auction. A chair of a simpler design that was used by Queen Mary at the Coronation in 1937 was offered from the Collection of HRH The Princess Margaret at Christie’s in 2006, and sold for £38,400.

I am surprised how much more ornate his chair is compared to Queen Mary's chair.