There are scratches on the appearance, but there is no problem with installation. The screw mounting diameter is f20 mm. (Not F mount) It's quite old and manufactured in the 1990s. It was stored in the dark for a long time.
In addition, mold, dirt, and scratches may be overlooked. International Buyers - Please Note. These charges are the buyers responsibility. The item "Nikon Microscope Objective Lens M Plan 20 0.4 ELWD 210/0 Limited Japan MTE008" is in sale since Monday, March 29, 2021. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical/Lab Equipment Attachments & Accessories\Microscope Parts & Accessories\Microscope Objectives".
The seller is "koaoy-0" and is located in Kanagawa. This item can be shipped worldwide.