This 20 mm eyepiece is a true H-M design, made in Japan by Vixen. It has a large meniscus field lens and a smaller, plano convex eye lens, both fully coated, and mounted in a chromed brass barrel. This is the nicest Huygens eyepiece that you will probably ever see, and nothing at all like the cheap .965" oculars that come from China these days. I once owned a little Huygenian ocular of the same fl by Zeiss, and this model is every bit as good.
Please be aware that while this is an exceptionally nice little ocular, it is designed for use with long f/ratio refractors, on which it performs very well. It is not designed to work on fast reflectors or "shorty" refractors, and does not work well with such instruments.
This particular eyepiece has some minor scuffing around the rim of the top portion that is not visible in the photo. Otherwise, it is optically perfect and otherwise OK. Am asking $22.00, which includes postage and insurance to your USA or Canadian address.
Milt Hays, Jr.