The Charter gave regulatory authority to the Clockmakers to control the horological trade in the City of London and for a radius of ten miles around. It incorporated a controlling body which should have ‘continuance for ever under the style and name of The Master, Wardens and Fellowship of the Art and Mystery of Clockmaking’. It provided that the Fellowship should be governed by a Master, three Wardens and ten or more Assistants who would form the Court. The first Master was David Ramsay, a Scot, who had been appointed watchmaker to James VI of Scotland, later James I of England. The noted clockmaker Edward East also formed part of the first Court. The original Charter is still in the company's possession and is housed with the rest of its library and archive in the Guildhall Library. The company obtained a grant of arms from the College of Arms in January 1672. In 1766, the Court of Aldermen granted the Company its livery. The number of Liverymen was originally limited at sixty but has been increased in number over the years by approval of the City of London Corporation and currently stands at a maximum of three hundred. The company bestows three awards for excellence: the Tompion Medal for outstanding achievements in horology, the Harrison Medal for the propagation of horological knowledge and its appreciation, and the Derek Pratt Prize for innovation, ingenuity, elegance, and the highest standards of workmanship and precision performance in the craft and science of time and timekeeping. The company also closely co-operates with the trustees of the George Daniels Educational Trust in supporting education in horology. The Clockmakers Company is formally affiliated with the Antiquarian Horological Society, the UCL Observatory, HMS "Protector", the Royal Navy's Ice Patrol Ship. and HMS "Archer", a P264 Class University Royal Naval Unit based in Edinburgh. Those who have been Master of the company include the following: