An early 20th-century scientific monocular microscope manufactured by Spencer Lens Co. of Buffalo, New York (serial number 33904), crafted with a black japanned cast iron horseshoe base and arm, brass adjustment knobs, body tube, and objective lens, complete with a fitted wood carrying case (lacking front door). The instrument shows age-appropriate finish wear, brass patina, superficial surface oxidation, and light dust, while remaining structurally intact and presentable. H 15", W 7.5", D 8.5". Please see photos for condition.