A rare 2 inch Dallmeyer Max-lite projection lens. The outer barrel where there is a screw thread is 28mm in diameter. Its  The big lens is about 32mm, and the smaller lens about 20mm (so F1.6?). It has the serial number 313022, and the overall length is 2.75 inchs. There are specs of dust typical of age when you look within, but I did not note fungus as an issue.

Thanks for looking.

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