ONLY ONE AVAILABLE - PICTURE SHOWS PAIR FOR ILLUSTRATION ONLY
Nikon CFWN 10X Eyepiece.  The Nikon number is 84011 and are intended for the Nikon Alphaphot, Labophot, Optiphot, Microphot and TMD series of microscopes having 160mm or 210mm tube length.  Will work equally well with any microscope with an eyetube diameter of 23.2mm such as Zeiss, Olympus and Leitz.  This model eyepiece has a field number of 20mm as opposed to the standard 10X eyepiece which has a field number of 18mm.  The field of view is roughly 12% larger with this.  The last list price for this eyepiece was $365.00 each.