A letter dated 1937 is recorded which states that this watch was reputedly given by Princess Sophia, daughter of King George III, to her lady-in-waiting, a member of the Wynyard family. Although no piece by Rentzsch survives in the Royal Collection, he is recorded on the list of royal tradesmen between 1821 and 1857. Indeed, on a receipted account from Sigismund Rentzsch for work carried out on the clocks and watches belonging to "Her Late Royal Highness Princess Augusta," dated October 1840, Rentzsch describes himself as “Watch & Clock Maker to the Queen, their Majesties the Dowager Queen, The King of Hanover, The king of Belgium and the rest of the Royal Family, inventor and sole vendor of the circumvoluting watches, St James’s Square” [for an illustration of the invoice, see: Antiquarian Horology, No. 4, Vol. 7, September 1971, p.340]. Confusingly, George III's sixth child was christened Augusta Sophia (1768-1840), while his twelfth was christened Matilda Sophia (1777-1848). For an article on Sigismund Rentzsch and a detailed description of a similar watch by this maker, see T. P. Camerer Cuss, Sigismund Rentzsch, Antiquarian Horology, No. 5, Vol. 5, December 1966, pp. 164-168. For a further keyless winding/repeating watch by Rentzsch, see: Peter Friess, Patek Philippe Museum, The Emergence of the Portable Watch, Vol. IV, 2015, p.610.
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