New Old Stock Spool for International Disc Harrow Models 37, 46, 48, 60, 61, 76, 120, 122, 130, 132, 150, 330, 350, 370, 470, 480, 490, 610 and 760 WITH 7-1/2" inch and 9" inch spacing.
Spool is 4" inches long and would fit 1-1/8" inch axle with 4" inch square hole.
Case IH part number 472591R3.
Came from a dealership liquidation.