Rolev Magi-Glas Polarizer filter for 52 mm camera lens

This vintage Rolev Magi-Glas polarizer filter for 52 mm camera lenses. The box has foxing, and the lens light evidence of use with a little dust in the crevices, but it has no damage. Both the polarizer and rim are plastic, so it is light weight. Screws on, and the outer ring turns to optimize the polarization. Works fine.