A good eyepiece finely engraved Carl Zeiss Jena.Lenses are clean and in excellent condition. Dismantles as it should, all threads good.Will work on any microscope, fitting size is 35.75mm. I placed it on top of my microscope and it gives a very good sharp image. Top is marked 12 compens ocular.The marks that appear on the lenses in the photos are just reflections.There is some slight wear to the plating on the body.