Cooke, Troughton and Simms Ltd - M25 Series Binocular 1.5x Microscope. Pat No 201395. Features - Example, A Fine Focusing and The Limb Moves on a Rack and Pinion, For Coarse Focusing, These are Adjusted by Concentric Controls on Each Side. 13.75 Inches High - Please See Photo. Comes with Original Wo