Lepaute, J.A., Horloger du Roi, ?Traité d?Horlogerie?, first edition, Paris, 1767.
Rebound in style in light brown calf with gold stamping on spine, marble endpaper. Light foxing to title page else text and plates are exceptionally clean and bright. 345 pages, 17 plates. An important work, relatively rare. 26 x 19 cm.
Grading System: 
CHF 1,800 - 2,200
EUR 1,200 - 1,500
USD 1,100 - 1,300
Sold: CHF 11,500
with seventy-eight woodcuts and twenty-two folding colored copper plates Second edition Crosby Lockwood And Co., London, 1887, 844 pages, 28 x 19.8 cm. Green calf with green cloth boards. Wear to corner tips. Endpapers have been replaced. Text is clean and sound with 2 tiny edge tears to last copper plate fold-out.
Grading System:
CHF 700 - 900
EUR 480 - 620
USD 420 - 640
Sold: CHF 3,450
Saunier, Claudius, ?Traité d?Horlogerie Moderne Théorique et Pratique?,
with seventy-eight woodcuts and twenty-two folding colored copper plates separately bound, third edition, Paris, Revue Chronométrique, 1887, 836 pages, superb copy in contemporary binding with paper-covered faux burl boards, concave bands, tooled in gold, endpapers with signature ?Louis Palhiès, Horloger St. Affrique?. Text and plates are clean and tight. Slight superficial edge crack on fore-edge of front cover. Good condition.
Grading System:
CHF 500 - 600
EUR 350 - 420
USD 300 - 360
Sold: CHF 1,265
Second Edition, 272 pages, 21.7 x 13.4 cm., 9 folding copper plates. Rebacked in style. Possibly lacking frontis. Text is exceptionally clean.
Grading System:
CHF 1,200 - 1,600
EUR 800 - 1,100
USD 700 - 1,000
Sold: CHF 4,600
Parts Containing All The Arithmetic And Geometry Necessary?, London, 1773,
First Edition. Printed for T. Longman and G. Robinson, 18 copper plates, 400 pages. 20.3 x 13.4 cm. A superb copy in contemporary binding with paper-covered faux burl boards, Raised bands, tooled in gold with burgundy spine label. Marbled endpapers with inscription and 1852 date on free endpaper. Discreet bookseller's sticker on margin of front free endpaper. Text and plates are clean and tight. Slight superficial edge crack on fore-edge of front cover. Paper cover worn off edges of corners. Top corner of front cover slightly bumped. An exceptional copy.
Grading System:
CHF 2,800 - 3,200
EUR 2,000 - 2,200
USD 1,600 - 1,900
Sold: CHF 12,650
London, printed for Richard Cumberland at the Angel in St. Paul's Church-Yard 1694. 92 pages, 17.9 x 11.5 cm., one folding table. Rebound in dark brown calf with burgundy and navy gold stamped morocco spine label. Text is exceptionally bright.
Grading System:
CHF 1,800 - 2,200
EUR 1,200 - 1,500
USD 1,100 - 1,300
Sold: CHF 6,900
35 plates (figures), Rebound in medium brown calf. Inscriptions and names from 1814 and 145 and pencil notes on endpapers. Two small name 19th century name stamps on title page. 110 pages plus extensive tables. 16.6 x 10.2 cm. Text and plates are clean and in exceptional condition.
Grading System:
CHF 2,000 - 3,000
EUR 1,400 - 2,000
USD 1,200 - 1,800
Sold: CHF 2,760
Collection of letters, documents, photographs from and to the Royal Belgium family regarding commemorative watches. Leather-bound, edge cracked, corners worn. 25 x 32 cm.
Grading System:
CHF 4,000 - 6,000
EUR 2,800 - 4,200
USD 2,400 - 3,600
Sold: CHF 8,625
Lot of watchmaking tools, comprising:
Three Swiss ?compasses? circa 1890, tools for checking the proper meshing between wheels and pinions and transferring the distances to the watch or clock plates, two for watch work (26 lignes), one for clock work, all three in original fitted boxes, one with additional dead centers.
Grading System:
CHF 1,600 - 2,000
EUR 1,100 - 1,400
USD 900 - 1,200
Sold: CHF 2,300
Swiss, circa 1900. Fine brass clock mainspring winding tool.
U-shaped with crank lever and double click for winding in both directions, no lateral support, held by a steel lever controlled by the operator. Dim. 10 x 23cm.
Grading System:
CHF 900 - 1,200
EUR 600 - 800
USD 550 - 700
Sold: CHF 1,150
Lot of three watchmaking tools, comprising:
1. small brass wheel expending tool with adjustable seat and four punches in original fitted box, Swiss circa 1890;2. pivot polisher ?Autopivot? by A. Sirand & Co., Constantine with unusual crank lever feed 3. small steel tool for slotting, e.g. cylinder staffs.
Grading System:
CHF 2,500 - 3,000
EUR 1,700 - 2,000
USD 1,500 - 1,800
Sold: CHF 3,680
Lot of two Swiss watchmaking tools, circa 1890, comprising:
1. Dial micrometer metrically calibrated with 1/10 mm, graduation, 17 cm, long in specially made wooden fitted box 2. small repivoting tool with a revolver with 12 dead-centers with three additional drill holders in original fitted box.
Grading System:
CHF 600 - 1,000
EUR 400 - 700
USD 350 - 600
Sold: CHF 920
Probably Swiss, circa 1840. Very fine mahogany watchmaker?s bench.
Top with raised edges and with 7 small drawers at the back, below two columns of 8 and 11 drawers each with locking panels, center part with 3 small drawers on the right and one with a lock to the left, all drawers with fine small brass knobs, four large shallow drawer in the center, curved feet. 124 x 85 cm.
Grading System:
CHF 25,000 - 35,000
EUR 17,000 - 24,000
USD 15,000 - 21,000
Sold: CHF 46,000
Unsigned, Swiss or French, circa 1840. Fine brass and steel large face-plate engine.
Centering plate with three dog clamps, spring-loaded centering post, driven by a large wheel through two pulleys, two-directional slide rest controlled by micrometric screw, angular cutter adjustment, T-rest, later wooden base. Dim. 29 x 55 cm.
Grading System:
CHF 3,000 - 4,000
EUR 2,000 - 2,800
USD 1,800 - 2,400
Sold: CHF 5,520
Gulot à Paris, circa 1870. Fine and rare large brass wheel-cutting engine.
Dividing plate set for high numbers including 1440, blank reverse, spring-loaded direct locking arm with a thumb loop, cutting tool on a slide with a lever feed, depth feed by slide with a crank lever and a scale from 1 to 12, three steel feet with holes for screws, unusual linear displacement measuring tool fixed to the end of the frame bracket. Signed on the dividing plate: ?Devize par Gulot à Paris?. Dim. 47 x 50 cm.
Grading System:
CHF 1,200 - 1,800
EUR 800 - 1,200
USD 700 - 1,000
Sold: CHF 2,070
Thury & Amey, Geneva, circa 1870. Fine small brass microscope with a material slide.
U-shaped painted black cast-iron base, trapezoidal rack column, high-power lens with revolving dividing plate calibrated for 360°, brass slide with decimal calibration and also with circular adjustment, adjustable mirror below. Signed on the arm. Dim. 32 x 20 cm.
Grading System:
CHF 2,000 - 3,000
EUR 1,400 - 2,000
USD 1,200 - 1,800
Sold: CHF 4,025
Centering plate with three dog clamps, spring-loaded centering post, driven via two-wheel transmission and crank lever, unidirectional slide rest with angular and tilt adjustments, the latter with a scale, depth controlled by a knurled nut with micrometric scale (1-12), T-rest, later wooden base. Signed on the bed. Dim. 29 x 55 cm.
Grading System:
CHF 2,500 - 3,000
USD 1,500 - 1,800
Sold: CHF 4,830
Unsigned, Swiss or French, circa 1840. Fine large brass and steel face-plate engine.
Centering plate with three dog clamps, spring-loaded centering post, driven by a large wheel through two pulleys, two-directional slide rest controlled by micrometric screw, angular cutter adjustment, T-rest, later wooden base. Dim. 29 x 55 cm.
Grading System:
CHF 2,500 - 3,000
EUR 1,700 - 2,000
USD 1,500 - 1,800
Sold: CHF 4,370
Unsigned, No. 69/42, Swiss, circa 1895. Fine brass and steel rounding-up tool.
Large crank lever wheel with a pulley on a short horizontal lever, micrometric cutter centering, lever operated vertical slide, wooden base. Dim. 22 x 37 cm.
Grading System:
CHF 800 - 1,000
EUR 550 - 700
USD 500 - 600
Sold: CHF 2,530
Unsigned, Swiss or French, circa 1850. Very fine and rare brass planting tool.
Three pairs of vertical dead centers, each with separate horizontal slide with micrometric adjustments, one with angular, three brass legs with holes for screws. Dim. 25 x 25 cm.
Grading System:
CHF 10,000 - 12,000
EUR 7,000 - 8,500
USD 6,000 - 7,200
Sold: CHF 13,800