She had provided me a signed handwritten letter (in Russian and English) confirming that the lens came from Alexander's collection, but I don't have any other direct evidence to support the claim. Sadly, I came to know that she committed suicide not long afterwards. >>> However, even if you choose to be sceptical about the origin of this lens, it still holds great value as a fully functional, 90-year old collectible. Only light scratches and signs of use. Feel free to contact me if you have any questions!The item "Leitz Elmar 135mm f/4.5 Non-standard Uncoupled lens S/N 231" is in sale since Wednesday, October 14, 2020. This item is in the category "Cameras & Photo\Lenses & Filters\Lenses". The seller is "te3iz" and is located in Toronto, Ontario. This item can be shipped worldwide.