Senior Rotary Microtome Spencer Type PSAW Spencer 820 type latest model, with one knife 120mm and honing stone. Knife holder with lateral movement permits use of complete knife edge. Feed range 1-50 micron in steps of one micron with automatic feed release device. Independent feed mechanism with auto safety device and vice type object holder adds versatility to this instrument. The interior mechanism rests on a heavy cast iron base and is covered with a full swing protective cover for easier cleaning and lubrication. Complete in box with three object holders , 120 mm razor, oil can, honing stone and raxine cover.