This is a monocular microscope from Nikon, the YS2-T, aka the Alphaphot-2. It is in good working condition. All three of its attached objective lenses, 4x, 10x, and 40x, were able to focus on a subject (not included). The coarse focus knob may be a bit stiff, but it still maintains proper focus.
The bulb works and brightness can be adjusted with the knob on the base. No outside accessories are included.