There is no problem with the optical system. The mounting screw diameter is f20 mm. 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 40 DI 0.5 210/0 Limited Japan MTE005" is in sale since Sunday, March 28, 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.