This is a vintage sealed on card handheld / pocket Magnetic Magnifier for reading. It measures 3 1/2" by 2 3/8" and it features a magnet on its back so it can be held in place when maps or documents that are being read are placed on a steel backing or the magnet can be used for easily storing it such as on a file cabinet, appliance, etc. It is in mint unused condition as shown. 

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