An Andrew ROSS Wenham's Binocular Compound Microscope, circa 1865signed Ross London 5167, with dual adjustment to the eyepieces, rack and pinion ...

A Silvered Brass Perpetual Calendar, English, 2nd half of 18th Century,good brass perpetual calendar, the observe with two volvelles and apertures...

A Dollond Brass universal equinoctial dial, English, Late 18th Century,signed Dollond London, silvered compass rose inset with two brass levels, ...

A silvered and gilt brass mechanical equinoctial dial, German, early 18th century,the circular dial with inset compass well and needle, mounted ...

A silver perpetual calendar, English, Late 18th Century,one face engraved with the days of the week and with apertures on the reverse with days of...

A James SHORT 3 1/4 Inch Reflecting Telescope on stand, circa 1760, English/Scottish, circa 1760,signed James Short no.220/1250-12, the tube with...

A Jesse Ramsden 2 1/2-Inch Brass Refracting Telescope on stand, English, Late 18th Century,Ramsden London, the tube with rack and pinion focusing ...

A Jean-Francois Richer Brass Theodolite, French, Early 19th Century,signed Richer A. Paris, telescope raised on a bracket of 55 degree vertical sc...

A W & S Jones Brass Portable Equatorial Telescope, English, Late 18th Century,the telescope with draw-tube focusing, raised in a bracket over 190 ...

A Robert Banks Brass Portable Transit Telescope, English, Early 19th Century,signed Banks, London, the telescope with rack and pinion focusing mou...

A Secretan 3 3/4 Inch Brass Refracting Telescope on stand, French, Mid 19th Century,signed on the eyepiece, the tube with star finder mounted in ...

A rare Smith & Beck Brass Compound Binocular Microscope, English, Mid 19th Century,signed on the foot, Smith & Beck 6 Coleman St. London no.759, w...

An Edward Nairne 1-inch spy glass, English, circa 1800,signed Nairne London, with single silver draw, tortoiseshell bound tube with bone mounts,...

A Thatcher's Calculator by Keuffel & Esser, Model 4012,with inner rotating cylinder and outer scales, on mahogany base, in mahogany case with cop...

A Moy & Bastie 35 mm Camera,no. 174 with Tessar f/3.5 lens lever focusing, mahogany body, with brass mounts and leather carrying handle Footnotes:...