This multiple-ocular microscope was made by the Geneva Optical Company during the late nineteenth century for Swiss physicist M. Thury. The microscope is described and illustrated in a short treatise entitled Microscopes to the End of the Nineteenth Century by F. W. Palmer and A. B. Sahiar.

Five eyepiece tubes are mounted on a central housing that contains a 90-degree prism, which allows light to be directed into each of the five tubes individually (but not simultaneously). Four of the eyetubes are provided with a focusing rack for adjustment of the ocular. A round rotatable stage is equipped with spring clips to secure the specimen into place. Main focus is achieved by a rack and pinion mechanism that moves the entire body-multiple eyetube assembly up and down. A substage condenser is illuminated with a convex mirror that is positioned on a gimbal beneath the condenser. The brass horseshoe base is adorned with an inlaid wooden finish.

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