Girard Perregaux & Cie, à La Chaux-de-Fonds, No 235998, circa 1900. Kuang Hsu.

Rare and very fine 18-carat gold hunting cased pocket chronometer with the famous three gold parallel bridge caliber, patented on March 25th 1884 and with a special escapement. Four body massive 'demi-bassine' polished case. Gold cuvette. White enamel dial with Breguet numerals and subsidiary second. Gold 'pear' hands. Fine 19"' damascened nickel movement with three 18-carat pink gold parallel bridges, 19 jewels screwed gold setting, gold train, reversed barrel, equilibrated straight line lever escapement in inverted position, 18'000 beating cut bimetallic balance, flat balance-spring with double Philippe's terminal curves, free sprung. In very good condition. Diam. 57 mm.

Charles Frodsham, by Appointment to the King, No 08867 ADFMSZ, 115 New Bond Street - late of 84 Strand London, Hallmarked 1900. Kuang Hsu.

Extremely rare and important large 18-carat gold highly complicated minute repeating, pocket chronometer, with split second chronograph, 60 minute recorder and one minute tourbillon regulator, specially ordered by J. Pierpon Morgan on a very limited number to be presented to his close collegues. Massive four body 'pomme et bassine' polished case. Gold cuvette. White enamel dial (Willis) with Roman numerals and outer minute and second rings, subsidiary seconds and minute register. Blued steel 'fusee' hands. High grade 23"' three quarte plate gilt bras keyless movement (Nicole Nielsen with Victorin Elysée Piguet ébauche), 29 jewels, screwed setting, one minute tourbillon driven by the second's wheel. The three equidistant armed polished carriage with gold poising weights drives the chronograph by means of its external gearing. English lateral lever escapement, cut bimetallic balance with gold poising screws, blued balance spring with terminal curve, free sprung, brass and polished steel pierced cock. Visible chronograph work. Striking on gongs by means of a slide on the band. In excellent condition. Diam. 63 mm.

S. Smith & Son, 9 Strand London, No 1901/20 Maker to the Admiralty and the Indian Government Hallmarked 1900. Kuang Hsu.

Extremely rare and important 18-carat gold, pocket chronometer with one minute tourbillon regulator, split second chronograph and 60 minute recorder. Massive four body 'pomme et bassine' polished case. Gold cuvette. White enamel dial (Willis) with Roman numerals and outer minute and second rings, subsidiary seconds and minute register. Blued steel 'spade' hands. High grade 22"' three quarte plate gilt brass keyless movement (Nicole Nielsen with Victorin Elysée Piguet ébauche), 24 jewels, screwed setting, one minute tourbillon driven by the second's wheel. The three equidistant armed polished carriage with gold poising weights drives the chronograph by means of its external gearing. English lateral lever escapement, cut bimetallic balance with gold poising screws, blued balance spring with terminal curve, free sprung, brass and polished steel pierced cock. Visible chronograph work. In excellent condition. Diam. 59 mm.

Patek Philippe & Cie, Genève, No 861467, case No 2615637, Ref. 3422. Very fine and extremely rare extra-flat asymetric pink gold gentleman's wristwatch model designed by Gilbert Albert circa 1958.

C. quadrilateral shaped, massive, polished with stepped sides. D. quadrilateral shaped, 'Champagne' with painted indexes. 'Bâton' pink gold hands. M. 8"'-85, rhodiumed, 'fausses-cotes' decoration, 18 jewels, lever escapement, monometallic balance adjusted to 5 positions, self-compensating flat balance-spring. In very good condition. 29 x 25 mm.

Patek Philippe & Cie, Genève, No 857332, case No 2615148, Ref. 3424, circa 1961. Rare asymetric 18-carat gold gentleman's wristwatch, model designed by Gilbert Albert, circa 1958.

C. quadrilateral, massive, polished, satined, fluted bezel and lugs. D. quadrilateral, mat silver, with indexes. 'Bâton' gold hands. M. 8"'85 rhodiumed, 'fausses-côtes' decoration, 18 jewels, lever escapement, monometallic balance adjusted to heat, cold isochronism and 5 positions, self-compensating Breguet balance-spring. Dial, case and movement signed. In very good condition. 27 x 26 mm.

Cartier Tank, Paris, No 25556, 1929. Very rare and large jumping hour and minute 18- carat gold gentleman's wristwatch with pink gold deployant clasp, made in 2 examples only, this for The Pacha of Marrakesh.

C. massive, polished, satined sapphire-set winding-crown. D. polished with apertures for the hours and minutes. M. 9''', signed European Watch & Clock Co. Inc., rhodiumed, 'fausses-cotes' decoration, 19 jewels, lever escapement, cut bimetallic balance adjusted to 6 positions, Breguet balance-spring. Case and movement signed. 2 4 x 3 7 mm.

Cartier, Paris, No 20834, 1940's. Extremely rare and fine astronomic rectangular 18-carat gold gentleman's wristwatch, with triple date and moon phases.

C. massive, polished, bezel with indexes. D. mat silver with indexes, outer graduation for the days of the months, apertures for the days of the week, the months and the lunations. M 8"' signed European Watch & Clock Co Inc., tonneau shaped, 15 jewels, lever escapement, monometallic balance, self-compensating flat balance-spring. Dial and movement signed. 23 x 41 mm.

Cartier, Paris, No 19824, 1920's. Very rare rectangular 18-carat gold and enamel gentleman's wristwatch with concealed dial.

C. massive, polished, top cover decorated with a blued enamelled filet, ogival shaped lugs. D. mat silver with Roman numerals. Breguet blued steel hands. M. 9 signed European Watch & Clock Co, rhodiumed, 'fausses-côtes` decoration, 18 jewels, lever escapement, cut bimetallic balance adjusted to 2 positions, flat balance-spring. Dial, case and movement signed. In very good condition. 24 x 27 mm.

Patek Philippe & Cie, Geneve, No 868343, case No 687759, Ref. 2499 (1st serie), circa 1955. Fine astronomic 18-carat gold gentleman's wristwatch with perpetual calendar, moon phases, square button chronograph, register and tachometer, produced in 349 examples between 1950 and 1985 (first serie 1950-1960 ca.).

C. massive, polished, satined, fluted lugs, concave bezel. D. mat silver with applied gold Arabic numerals + auxiliary second and 30 minute register dials, graduation for the days of the month, outer minutes, seconds and tachometer indications, apertures for the days of the week, the months and the lunations. ' Feuille' gold hands. M. 13"' 0, rhodiumed, 'fausses-cotes' decoration, 23 jewels, lever escapement, cut bimetallic balance adjusted to 8 positions, Breguet balance-spring, micrometer regulator. Dial, case and movement signed. In very good condition. Diam. 37 mm.

Patek Philippe & Cie, Geneve, No 868098, case No 668389, Ref. 1518, circa 1953. Fine astronomic 18-carat gold gentleman's wristwatch with perpetual calendar, moon phases, square button chronograph, register and tachometer, produced in 281 examples between 1941 and 1954.

C. massive, polished, concave bezel. D. rare mat silver with applied gold Arabic numerals + auxiliary seconds and 30 minute register dials, graduations for the days of the month, outer minutes, seconds and tachometer indications, apertures for the days of the week, the months and the lunations. ' Feuille' gold hands. M. 13"' 0, rhodiumed, 'fausses-cotes' decoration, 23 jewels, lever escapement, cut bimetallic balance adjusted to 8 positions, Breguet balance-spring, micrometer regulator. Dial, case and movement signed. In very good condition. Diam. 35 mm.

Patek Philippe & Cie, Genève, No 862278, case No 621870, Ref. 1436, 1941. Extremely rare and fine 18-carat gold gentleman's wristwatch with square button split-second chronograph, register and tachometer.

C. massive, polished. D. mat silver with applied gold Breguet numerals + auxiliary seconds and 30 minute register dials, outer tachometer graduation. 'Feuille' gold hands. M. 13''', rhodiumed, 'fausses-cotes' decoration, 25 jewels, lever escapement, monometallic balance adjusted to 8 positions, self-compensating Breguet balance-spring, micrometer regulator. Dial, case and movement signed. In very good condition. Diam. 33 mm.