This monitor is in good working condition with no screen scratches.
Slight discoloration on the case.
The VCDTS21375 is the model or part number for the Optiquest Q51, a 15-inch, medium-short persistence, anti-glare CRT monitor known for its VGA/SVGA compatibility, featuring an analog RGB signal, 0.28mm dot pitch, and controls for brightness, contrast, and picture positioning, popular in the era of older PCs like 386s, 486s, and early Pentiums. 
Key Specifications & Features:

    Type: CRT (Cathode Ray Tube) Monitor.
    Screen Size: 15-inch (13.7-inch viewable).
    Dot Pitch: 0.28mm.
    Compatibility: IBM PC (XT, AT, 386, 486, Pentium), PS/2, Mac (Power Mac).
    Resolutions: Up to 1024 x 768 non-interlaced for PCs.
    Input: 15-pin mini D-sub connector.
    Controls: Power, Contrast, Brightness, H/V Position/Size, Pincushion, Degauss.
    Surface: Anti-static, anti-glare, dark bulb