I have collected and photographed with most of these Brass Lenses for more than two decades in Sweden. Due to a change in life circumstances I now wish to sell the entire Brass Lenses. I will only sell my collection if you come here to Sweden and inspect and pay on the spot. Lenses are currently in a safe storage which is temperature and humidity controlled.
If you are a serious buyer, investor or dealer, for information, contact me at: memaden[at]me[dot]com