Old school Logitech TrackMan Marble Mouse model: T-CH11. The mouse is used and shows signs of cosmetic wear and tear small scratches, discolored plastic, and missing one of the rubber boots. The mouse has be cleaned using 91% ISO alcohol before listing.  Tested working. 

Please note this mouse is the older ps/2 style connector not USB. It will require a adapter for motherboards/cases without this port.