Details of the Throne Chairs from the announcement about historic chairs reused:

Made by White, Allom and Company, in a seventeenth century style which in turn was based on X-framed Tudor stools. The Chairs were upholstered in crimson velvet and applied with the Royal Arms of King George VI and Queen Elizabeth .In preparation for the Coronation, the Chairs have been conserved by the Royal Collection Trust’s Furniture Conservators. The crimson silk velvet has been replaced with new velvet and trimmings and the chairs reupholstered by the firm of AT Cronin Workshop Ltd. 

New silk braid and trellis fringe, replicating the original trimmings of the Throne Chairs has been woven by Heritage Trimmings Ltd of Derby.  The silk was produced by The Humphries Weaving Company, Suffolk, and the silk for the fringe has been specially dyed by Gainsborough Silks, Suffolk. The Royal School of Needlework conserved the original embroidered Coat of Arms on His Majesty’s chair before transferring it onto the new velvet. In addition, the new Coat of Arms of The Queen Consort has been hand embroidered on Her Majesty’s Throne Chair using the silk shading technique, which has been applied to the new velvet.