Case Construction King 580C Loader Backhoe Tractor Pewter Belt Buckle 1976 1975 The Case Construction King 580C Loader Backhoe Tractor Pewter Belt Buckle from 1976 is a unique collectible item for fans of agriculture and vintage advertising. Made of pewter in a silver color, this oval-shaped belt buckle features the iconic Case brand and represents the 580C backhoe loader tractor. The buckle was created in 1975 by Sales Guides Inc in Mequon, Wisconsin, making it an original piece with a theme centered around agriculture. This rare advertising artifact originates from the United States and is perfect for collectors looking to add a touch of nostalgia to their collection.