Leitz A36 POOEL (polarizing) filter except it has problems
Leitz POOEL polarizing filter for A36 slip-on mount. Fits early thread-mount Elmar, Summar & other lenses. As shown in the image, this filter has a less-than-even polarizing film, and will likely do a pretty bad job of being a polarizer. It is sold as-is for parts or repair.