Nikon achromat-aplanatic high numerical aperture (1.35 NA) substage microscope condenser.  This condenser can be used on Nikon microscopes from the Labophot series up through current Eclipse series.  It can also be used very effectively on microscopes of other manufactures as long as the condenser fork will accept a circular dovetail of 46.60 mm.  It gives spectacular results with a higher NA objective.  The Nikon number is 79052 and the last known list price of $824.00.  It is in excellent cosmetic and optical condition without scratches, fungus, dust or element separations. The condenser diaphragm moves smoothly and is not fouled by oil.