Note that the upper portion of the microscope can rotate relative to the base

This microscope was the top of the line model sold by the firm at the time. It is capable of full rotation around the optical axis. It comes supplied with seven objectives, four eyepieces, a set of four aperture stops, a substage condenser, separate polarizing condenser and goniometer eyepiece analyser, a hand loupe, a pentagonal objective changer, a camera lucida, and a cover-glass thickness gauge.

The following was extracted from the 1872 price list published in Das Mikroskop und die mikroskopische Technik by Heinrich Frey:

This microscope is a transitional model between the Leitz Stand No. I made in 1870 which still incorporates the limb found on the earlier microscopes of Kellner, Belthle, and Rexroth and the more conventional Continental models of later years.