Vintage "Index Horse" weather vane pattern is a well-known design in American folk art, often attributed to J. Howard & Co. from around the mid-19th century. They were typically made of materials like copper or cast bronze, known for their durability. The one pictured is described as cast bronze. The bronze has aquiered a nice verdi gris patina Historical Significance: Versions of this iconic design have been featured in major art exhibitions, highlighting their importance as early American sculptural forms.