I found these three porcelian pieces at an antique barn last weekend. Could any of you mud guys help me identify their respective U#, makers and estimated value. The antique barn also has another of the hay stack style ones left if anyone is interested I could make arrangements to pick it up when I'm in the area again.

From my research the center is a U-172 Pittsburg and the insulator or the right is a U239A made by the Pittsburg High Voltage Co. I have no idea what the U# of the one on the left is. It is shaped like a CD 162. Correct me if I'm wrong. Thanks.