Although this particular microscope is unsigned, a nearly identical microscope having a different stage design is known that is signed L. Schrauer, New York. Additionally, note the following extract from the 1882 American Monthly Microscopical Journal, pg. 158.

To THE EDITOR : I think I am doing a service to users of the microscope, especially to those who intend to carry microscopes with them on their journeyings this summer, by bringing to their notice a new stand made by Schrauer of this city, which " packs well." It has a base similar to that on the instrument which was known as the working model of George Wale, except that the base is made of solid brass, instead iron. Moreover, there are no parts of sheet-brass. By unscrewing the binding screw, this base can be removed, and, together with the rest of the stand, also taken apart, and laid between other goods in one trunk, thus taking up far less space and travelling more securely than the ordinary stand which tumbles about in a huge square case occupying almost half of the trunk. It is also an excellent stand to take to Microscopical Society meetings for it may be put into a small hand-bag, which can be carried much more easily and comfortably than the square box usually carried. In addition to its good qualities as a traveller, the specimen of this stand which I have possesses other excellencies. It is heavy, firm, with a low, solid stage, a tripod foot, a short tube capable of elongation, adjustments of extreme accuracy and smoothness, the coarse by rack and pinion, the fine by a long sensitive lever, and it cost only twenty five dollars.

W. H. M.

This microscope is based on the design of the "The New Working Microscope" first introduced by George Wale.

Leopold Schrauer first began the manufacture of microscopes in Boston. By 1877, he was located in New York City at various addresses. Schrauer microscopes are relatively uncommon. In the book entitled A Short History of the Early American Microscopes by D. Pagitt, it is stated "It is somewhat strange that Schrauer's microscopes are not more common today, since he was apparently in business for more than 20 years. This may be partially explained by Schrauer's proclamation that he gave no discount to the trade which would indicate that he did not have access to the traditional marketing agencies".