Here is a very good condition pair of Leitz 10x magnification Periplan microscope eyepieces in standard 23mm diameter fit. The eyepieces are in clean condition with nice bright optics and one of them is also focus-able as shown. They are a quality pair of optics from the well-known Leitz optical brand. This item is in the category "Antiques\Science/Medicine\Scientific Instruments". The seller is "arcboutant" and is located in this country: GB.