FTJWEB04-117 Lot of two aluminum MARX patent levels. Two 24" examples of the patent by EMIL MARX of Royal Center, IN. One marked Marx Mfg. Co. with circular plumb vial openings and other marked only with his 12/24/14 patent date and has horseshoe shaped plumb vial openings. Center vials are identical. All vials wet and a few rust spots. (PRK330,331)