New Old Stock Sharpener Attachment for International No. 15 Field Harvester - Chopper The sweeps are manufactured by

The sweeps are manufactured by Wiese

Will NOT fit tractors with the deluxe seat frame (square seat frame with separate cushion)

This seal mounts in Case IH 3 Bolt Differential Retainer part number 6578D

The "O-C" meant Oliver Chilled patterned plows

It is 4-1/2" inches from the back side of the bumper to the mounting hole plate

New Old Stock Sharpener Attachment for International No. 15 Field Harvester - Chopper The sweeps are manufactured byNew Old Stock Sharpener Attachment for International Number 15 Field Harvester. Also referred to as Chopper or Forage Harvester. Case IH Sharpener Attachment part number 459970R91. Came from a dealership liquidation.