vintage Spencer Buffalo microscope

vintage Spencer Buffalo microscope, likely manufactured around 1918, given its serial number 98656

Here are some key features:
It is a monocular microscope, designed for viewing specimens with one eye.
The microscope has multiple lenses, including a 10X eyepiece and potentially 16 mm and 44X objective lenses.
It features a rack and pinion system for coarse focusing and a micrometer screw for fine focusing.
The Spencer Lens Company, the manufacturer, was the first American microscope maker.
It is considered a compound microscope, offering higher magnification (40x to 1000x) compared to stereo microscopes.
It's designed for observing cells, bacteria, and other microscopic samples.
The microscope is fully functional despite its age, though it may show signs of wear like rust and corrosion.