The product is a rare cast iron eggscale grader with the embossed mark "Zenith" This item falls under the category of antiques, specifically in the Mercantile, Trades & Factories section, and is a unique piece for collectors of vintage scales. The Zenith brand and the specific location of Earlville, NY add historical and nostalgic value to this antique piece.   It is showing it's age and was used on an Amish farm for years.