English, c. 1830, engraved to the foot 'Improved Compound Microscope by Crichton, 112 Leadenhall St, London, the body tube with rack and pinion focusing, supported by barlimb at top of the column, compass joint and folding flat tripod base, in fitted mahogany case with candle holder and condenser, set of bone and boxwood mounted slides, seven numbered objectives, livebox, the French polished mahogany case 40cm wide.

Footnote: for a similar instrument see G L'E Turner, The Great Age of the Microscope, p.73