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The instrument sits on a horseshoe base and a slotted rectangular pillar supports the stage and tubular limb. Below the stage are a rotating double mirror, a swinging platform for the iris diaphragm (which moves on the platform by rackwork), and an Abbe condenser. The substage moves vertically by rackwork. It comes with a wooden carrying case. Signed C. Zeiss Jena 19146.