DESCRIPTION:
Signed on the arm: 'NACHET, Opticien a Paris The original fitted case accompanies the instrument. This drum or Martin-type microscope stands at approximately 13 inches high (minimum), with a 4 1/4 inch heavy leaded base. Coarse focusing is simply by sliding the tube, fine is by fine-threaded screw acting from the underside on the sprung continental-style limb. There is a planoconcave mirror and a carrier under the stage to accept substage fittings. One of the unique features of these Nachet drum models was the pull-out substage holder which could hold a polarizer, a variety of stops, etc. It is moved up or down by lever.