b'48Clocks & Timepieces480JAMES TREGENT of London, rare and possibly unique George III world time spring table clock, circa 1770.Housed in a finely veneered mahogany bell top case with flamb ormolu finials. Brass bail carrying handles to the sides with sun god decorated brass sound frets and surrounding brass quad mouldings. Brass bound lower plinth mould terminating on brass ogee bracket feet. Shallow break arch brass dial with vitreous enamel subsidiary dials for rise/fall and strike/silent. The unique enamel twenty-four hour time dial with Roman numerals and minute track. Minute hand and cluster world time hands for the cities of London, Vienna, Jerusalem, St. Petersburg, Bengal, Peking, Boston and one other (possibly New York). Three train fusee movement with pivoted verge escapement chiming the quarters on a nest of eight bells and the hour on a further large bell. Pendulum transport lock to the handsomely Rococo engraved back plate with central makers cartouche, signed JAMs. TREGENT, LONDON.57cm high, 32cm wide, 21cm deep.PROVENANCESothebys London, Watches, Wristwatches, Barometers and Clocks, Tuesday, 21st July, 1987, Lot 232.NOTESThis clock is pictured and described in the publication The Georgian Bracket Clock, 1714-1830 by Richard C. R. Barder, page 98 and is accompanied by an original letter from the author discussing the clock with the vendor. (2)$20,00030,000480480 (Detail) 480'