Antique WP 36 USA Porcelain Electric Fence Insulators

Found in a barn built in 1910, This pair of milky white (2nd photo shows accurate color) ceramic porcelain insulators were used on electrical fences, are without threading and have USA WP36. embossed on the top ring. The bottom ring has a bisque feel. Would be a unique paperweight, displayed on the wire or an addition to an insulator collectors collection. Very good condition-no chips or cracks/the rust colored marks are probably a result of being on a wire. M#2