New Old Stock Front Landside for Ferguson AO Series Moldboard Plows.
Ferguson Plow and aftermarket part numbers: 12I-AO-173, 12IAO173, 121-AO-173.
The mounting holes are 4 inches apart (center of mounting hole to center of mounting hole).
This landside is for the "Chilled Iron" (cast iron) Type "I" Ferguson AO plow bottom not steel as used in later models Ferguson plows.
Tillage parts labeled as "New Old Stock" are from various manufacturers. These items will fit and function correctly but vary in color or slightly in shape due each manufacturer's unique pattern. They could be from the original equipment manufacturer or any number of aftermarket suppliers such as Weise, Adams, Osmundson, Crescent Forge, Veldmaster, Star, S&J Kitchin, Hamburg Plow, King Plow, C.F.C., Herschel, and others. Some of these parts have been out of production for many decades. The brand of tillage parts will vary as inventory is acquired. There may be some surface rust due to long term prior storage.