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Description is exactly The compound microscope is made of lacquered brass and mounted on a japanned black cast iron horseshoe base. The main body tube is mounted on top of a four-inch brass pillar via a compass joint which allows the complete optical assembly to tilt over a range of 90 degrees. There is an inner sliding body tube extender which increases the body length by up to 3 inches. A removable substage condenser has an adjustable diaphragm opening (20 mm max.) The circular specimen stage is engraved "Betz Special, Chicago, Illinois" and has a substage diaphragm located underneath the stage. Many of the Betz microscope components were apparently manufactured by the Gundlach Manhattan Optical Company and some of the Betz microscopes were delivered with Zeiss lenses. The microscope comes with its original hardwood carrying case. It has an interior draw that holds the accessories. The case is secured by a brass swing hook on the side of the case and has a brass carry handle.
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