American Optical Stereo Star #569 stereo microscope.  Nice operating condition - parfocal and zooms straight.  The Teflon zoom gear was inspected and no defects were found.  It comes equipped with 10X widefield eyepieces, Nicholas Illuminator and trans-base with glass stage plate.  The zoom range is 0.7X to 3.0X allowing for total magnification of 7X to 30X.  The images are sharp.  Several units available similar to picture with typical cosmetic wear and tear - all clean and completely functional.