The F-mount is not genuine Olympus but an after-market mount. The last two photos show the adapter mounted onto a Nikon DSLR.
To install the mount, line up the white triangle with the white dot on Nikon body (see last photo). Some minor scratches from use.
Before accepting, please be sure you want the item. The item "Olympus IX-TVAD Photo / Video Adapter & F-mount, Olympus IX 50/70/71 Microscopes" is in sale since Monday, July 19, 2021. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical/Lab Equipment Attachments & Accessories\Microscope Parts & Accessories\Microscope Camera & Lens Adapters".The seller is "weaksidehelp" and is located in Albuquerque, New Mexico. This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, Indonesia, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Chile, Costa rica, Dominican republic, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Paraguay, Reunion, Uruguay.