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Zeiss Stativ IVa brass microscope - circa 1895

This is a Zeiss Stand IVa that was introduced between 1883 and 1885. It is signed "C. Zeiss, Jena, 18095" on the objective tube and measures 11 1/2" high when closed. Coarse focus is by rack and pinion; fine focus is controlled by a micrometer knob on top of the limb. The lens barrel is variable with a graduated drawtube. The instrument is entirely brass with black painted brass base, vulcanite stage, and original laquered brass elsewhere, except on sliding parts. The lacquer coverage is 100% with very minor spotting. The plano-concave mirror is excellent on both sides. A sub-stage Abbe condenser has a swing-out variable iris diaphragm. The diaphragm can be shifted off axis and rotated to allow for oblique and dark-field illumination. A separate single fine hole diaphragm is also included in the set.  Three original Zeiss lenses accompany the microscope. One is marked "AA", another "B", and the third "D". All have matching brass Zeiss canisters. There are three eyepieces, marked 1, 4, and a number 3 that is also marked "micrometer". The stage has an original Zeiss mechanical slide holder attached. All controls function properly. The optical system is excellent. A mahogany case with brass carry handle houses the microscope and lenses. This is an excellent example of the very popular Continental model from the last decade of the 19th century.

Item 1067

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