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Lot 251
An unusual George II black japanned table clock with Dutertre`s duplex escapement. Indistinct original signature, circa 1740. The five pillar twin fusee bell striking movement with escapement composed of two escape wheels of varying diameter mounted on the same arbor which alternately engage with cranked pallets fitted with a standard verge type short bob pendulum, the backplate finely engraved with a grotesque mask within Ho-Ho bird inhabited foliate scrolls and a narrow ropetwist border, the 7 inch brass break-arch dial with calendar aperture to the matted centre within applied silvered Roman numeral chapter ring and Indian mask and scroll cast spandrels to angles, the arch with original signature boss bearing re-engraved script Tho Tompion, LONDINI (indistinct traces of original script visible on close examination) within a herringbone border and flanked by conforming mounts, the inverted bell-top case with foliate cast brass carrying handle above front door with scallop shell and scroll cast brass frets to upper quadrants, the sides with ruby glazed windows above blanked break-arch apertures, the rear with conforming glazed upper quadrants over break-arch aperture, the exterior decorated in raised polychrome and gilt with chinoiserie designs within foliate borders throughout, the cavetto moulded base with later brass bun feet, (finish rubbed, other relatively minor faults) 44cm (17.75ins) high excluding handle. The escapement in the current lot appears to be an early/contemporary application of the duplex arrangement as designed by the French horologist Jean Babtiste Dutertre (worked 1715-42), and was perhaps conceived as attempt to improve on the tic-tac escapement. The principle benefit is that the wear rate is greatly reduced as the pallets only engage once with each tooth for each rotation rather than twice (once from either side) for the standard tic-tac arrangement. In essence one wheel provides the entry action of a recoil arrangement and the second controls the exit. This division of the function of the escapement between two wheels allows the teeth on each wheel to be of a heavier profile than on the single escape wheel of a tic-tac escapement, further improving reliability and longevity. Dutertre`s design is illustrated in Reid, Thomas A TREATISE ON CLOCK AND WATCH MAKING plate IX/48 and is briefly described in Appendix B. The overall style, design and layout of the movement suggests London work from the second quarter of the eighteenth century. The engraving to the backplate is unusual being centred with a grotesque mask within a shaped reserve however the Ho-Ho bird foliate scroll infill is more typical of decoration found on London made clocks of the period. Overall the current lot has survived in original condition (including the escapement which is unaltered and has always been with the clock), however the erasing of the original signature to the boss in the arch is a shame as the name of maker of this unusual form of escapement has been lost, although further research and examination could result in a positive attribution.
Lot 259
A fine George II walnut table clock. Robert Ward, London, mid 18th century, The five pillar twin fusee bell striking movement with foliate scroll engraved backplate and 7 inch brass break-arch dial with false bob and calendar apertures and applied shaped signature plaque Rob`t Ward, LONDON to the matted centre within applied silvered Roman numeral chapter ring with Arabic five minutes to outer track and scroll cast spandrels to angles, the arch with Strike/Silent selection dial flanked by conforming mounts, the burr walnut veneered inverted bell-top case with brass carrying handles and flambeau finials (not illustrated) above gilt foliate frets to upper quadrants of the front door and raised mouldings to apertures, the sides with circular ruby glazed windows over concave-topped rectangular brass fishscale frets, the rear door with break-arch window, on cavetto moulded shallow skirt base now with foliate cast brass scroll feet, (escapement with alteration), 48cm (19ins) high. Robert Ward is recorded in Baillie, G.H. Watchmakers & Clockmakers of the World as working in London circa 1751.
Lot 3131
LEONARD, Eliza Lucy. The Ruby Ring; or, the Transformations. London: 1816. 4to (125 x 98mm.) 8 engraved plates. (Some spotting and browning.) Contemporary green straight-grain morocco gilt, bound for G. Ponsonby, the covers with roll tools within fillet borders, the upper covers with centrally-placed initials `G.P.`, the spine gilt, g.e. (extremities slightly scuffed, spine faded to brown). Provenance: G.G. Ponsonby (binding, inscription dated `August 14 1816` to preliminary blank).
Lot 63
Various antique stick pins, comprising oval head with a star set rose cut diamond, head stamped 15ct gold, two with ornate round heads, one with star set small ruby, the other with star set rose cut diamond, both tested 9ct gold & a base metal pin with garnet & seed pearl set head (gross 3.8g) (4)
Lot 116
Ladies` ring, comprising oval ruby in four claw raised crib setting, two small brilliant cut diamonds to shoulders, ornate pierced patterned under-bezel, size N or 6.1/2 US & a ladies` square shaped cluster ring, comprising red square cut stone to centre, surround of twelve white stones, white gold settings, yellow gold shank, size Q or 8 US both with 9ct gold h/m (5.2g) (2)
Lot 117
Ladies` ring, comprising tapered band with round cut ruby to centre, two small diamonds in illusion settings to each shoulder, 9ct gold h/m, size P or 7.1/2 US & a ladies` ring, comprising round cut ruby in four claw setting, small diamond to either side, open shoulders, stamped & tested 18ct gold, size I or 4 US (gross 3.7g) (2)
Lot 197
Ladies` cluster ring, approx. 22mm x 18mm, comprising brilliant cut diamond to centre, four sections each set with five small brilliant cut diamonds, total diamond weight approx. 1.00 carat, two marquise cut rubies to top & bottom, one marquise cut ruby to either side, white gold settings, yellow gold shank, 18ct h/m, size M or 6 US (7.3g)
Lot 73
A diamond, sapphire, and ruby dress ring, stamped `750`, the central line of channel set sapphires enclosed by small single cuts, with one channel set shoulder of rubies and emeralds to the other, finger size O; with an emerald dress ring, stamped `750`, of cross over design, channel set with calibre stones, finger size Q; 7.5g gross
Lot 160
A three stone ruby 9 carat gold necklet, the graduated stones with scrolls between and to a curved bar, on a filed curb link back chain, 49.5cm long overall; with a sapphire and diamond 9 carat gold cluster pendant, on a 9 carat gold chain, 50cm long; and an opal and emerald cluster pendant on a chain, 45cm long; 9.2g gross
Lot 253
A diamond and ruby 18 carat gold cluster ring, the central brilliant cut, of approximately 0.06 carats, enclosed by eight small round cut rubies, in turn enclosed by sixteen single cut diamonds, finger size M1/2; with an emerald cluster 18 carat gold ring; and a diamond and sapphire 9 carat gold ring
Lot 263
A diamond, ruby and calibre ruby 9 carat gold panel ring, Birmingham import marks 1991, finger size O1/2, 4g gross; with a peridot and pink two stone ring, having two small diamonds between, stamped `18K`, 4.3g gross; a three stone ring with diamond points to the end of each stone, unmarked; a ruby and emerald ring of swirl design, unmarked; and a blue synthetic single stone ring; stamped `9ct`
Lot 264
An opal and emerald 9 carat gold cluster ring, the oval cabochon enclosed by eighteen circular cut emeralds, finger size K; with another opal and emerald 9 carat gold cluster ring; an opal and emerald 9 carat gold ring, the four oval shallow cabochons with emerald points between; an opal and coral two stone ring of crossover design, unmarked; and an opal and ruby half eternity ring, with sizing beads placed over the hallmark; 13.3g gross
Lot 351
A ruby and diamond 9 carat gold ring, the three rubies separated by pairs of single cuts, finger size M; with a ruby and diamond fancy 9 carat gold cluster ring; two 9 carat gold stone set half hoops; an eternity ring, stamped `9ct`; and a cubic zirconia single stone 9 carat gold ring; 15.6g gross
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