A Swift Binocular "Challenge" Microscope, English, c. 1880, signed to the rear of the foot ’J. Swift & Son 81 Tottenham Court Rd, London’, standing on a black lacquered brass tripod base with trunnions supporting the main body, with plano-concave mirror in a gimbal on an articulated arm, polarising substage assembly with graduated polariser on swing out arm, rotating wheel to accept Selenite filters in geared rotating collars all on slide in/out mount with rack and pinion focusing, fully mechanical stage with with 360 degree engraved scale to edge with Vernier to 5’, X & Y control, body tube with course focus to rear and Swift’s patent lever fine focus, body tube with Wenham prism in pull out/in drawer, Nicol prism in pull out/in drawer, with the following accessories: a Swift 4in objective, a 2in objective, a 1in Swift objective, a 1/2in Swift objective, a 1/4in objective, a 1/4in Swift objective, a pair of binocular eyepieces engraved A, a pair of binocular eyepieces engraved B, a pair of binocular eyepieces engraved x10, all in the original French polished mahogany cabinet. Cabinet height 44cm