We have a large quantity of these! Nice plano concave glass lens made by Kodak. 32mm diameter with a focal length of -55. These are AR coated and edges are blackened. Edge thickness is 6.5mm, center thickness is about 2mm. Unused.
One of our customers had the following very creative idea for these: "makes a great base for spinning tops on a table or desktop. It's the right size and depth for most tops, and produces nice long spins." Thanks Bill
