English, c.1830, signed in large script to the foot 'Dollond London', with folding flat tripod base supporting a tapered column surmounted by a compass joint holding the adjustable limb of the microscope, the body of the microscope on a squared pillar with large 3¼inch diameter plano-concave mirror on adjustable collar, bull's-eye lens on adjustable collar and a heavy square stage with stabilizing supports to the front of the body tube, body tube with fine focus screw mechanism to top collar, stage with hole for mounting stage accessories, the top of the pillar with horizontal arm and ring carrying the body, microscope height 53cm

Footnote: Only three other microscopes of these proportions by Dollond are known, one is held in the Royal Scottish Museum, one in the Science Museum, London and the third sold at the Murray Mackinnion Auction at Sotheby's.

This microscope was one of the first commercially produced achromatic microscopes, at the time the only other achromatic microscopes in London were the prototypes of Lister-Tully and the Goring engyscope.