A late 19th-Century lacquered brass compound monocular universal microscope, signed on the body tube A Microscope Achromatique Universal de Charles Chevalier, Imperieur Opticien, Palais Royal, Paris, with rack and pinion vertical adjustment, the square section pillar with mounting for stage, condenser, and mirror, secured to the vertical pillar by bracket and pin and arranged for angular observation by compass joint, with accessories (incomplete), in fitted mahogany case - 12¾in. (32.4cm.) wide.