Yale & Towne ManufacturingThe "Yale Whiz" Cast Iron I-Beam TrolleyUSA, c. 1890A half-ton I-Beam trolley use to glide heavy items back and forth on steel I-beams.DimensionsW 9.75" D 7.75" H 9.25"DesignerDesigned by Yale & Towne ManufacturingManufacturerManufactured by Yale & Towne ManufacturingOriginUSAPeriodIndustrialCircac. 1890Manufacture year1890- 1910sREF No.12757.001Price$2,800MoreTearsheetShareAvailableWarehouse