This prototype was produced, I believe, in the mid-to-late 1970's by Ernst Leitz GmbH in Wetzlar Germany. As you can see this prototype is a very early version and was made using existing extension tubes with the optics cemented inside. This is a rare and unusual look into Leitz design work of the 1970's. Now for the legal stuff... Please ask any questions as soon as possible to give me an opportunity to respond. This item is in the category "Cameras & Photo\Lenses & Filters\Lenses". The seller is "danlam" and is located in this country: US. This item can be shipped worldwide.