A finely engineered and visually striking early 20th century compound microscope by E. Leitz of Wetzlar, Germany, serial number 150851, dating to circa 1908–1912. Constructed in lacquered brass with a black enameled tripod base, the instrument reflects the height of pre–World War I optical craftsmanship and precision manufacturing.
The microscope retains its original revolving nosepiece fitted with a complete and matched set of Leitz objectives, including a No. 3 low-power lens, No. 7a medium-power lens, and a 1/12” oil immersion objective—an advanced configuration intended for professional laboratory and medical use. All optics have been tested and are functioning, offering both display appeal and continued usability.
The instrument is further equipped with a fully realized substage illumination system, including an Abbe condenser and iris diaphragm, allowing for proper light control at higher magnifications. A precision mechanical stage by Reichert of Vienna (No. 19786), a respected contemporary maker of scientific instruments, has been fitted to the microscope, representing a high-quality, period-consistent enhancement typical of working laboratory environments.
The surface presents a rich, undisturbed patina with honest wear, preserving the integrity and character of a well-used scientific instrument. The combination of brass, japanned iron, and finely machined components creates a strong sculptural presence, equally suited for functional use or display.
A complete and working example of early German optical craftsmanship from one of the most important makers in the history of scientific instruments, later known worldwide through the Leica name.