For your consideration is this Basch & Lomb Optical microscope and case, circa 1915. The microscope shows a two optic rotator. The microscope is constructed from multiple materials, including steel, brass, and aluminum, and shows a patent date of Jan. 5, 1915. The condition of this microscope is good for its age, with no obvious signs of damage. The case shows slight wear to the exterior. The measurements of this microscope are 4" x 7" x 13" and the case measures 6 1/4" x 8 1/4"14 1/4".