If you want to be positively sure of what model JD plow you have, why not search for the Part Catalog for Free! (the .pdf file format catalogs will open automatically in Adobe Viewer and can be saved to your compuete & printed if needed). If you want to see the plow bottoms catalog search for 'Bottom' and you will find PC0158 (blacksmith type bottoms) and PC1308 (HS & NU series bottoms).
See the last few photos from the above gallery for detailed information on Syracuse plow bottoms.
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