Have you seen this porcelain multipart? I am looking for this Westy M-2610b, for my "Insulators of Old San Francisco" collection. Dimensions are 9" dia (upper shell), 7"dia (lower skirt), and 6" high. At on time, a very common piece, in Northern California---produced at the Emeryville Plant. Maybe you have one, kicking around as a door stop. Perhaps, we could make a deal. And yes, I will pay shipping.
Many thanks to Elton Gish, for scanning this picture, from his 1923-24 Westinghouse Line Material Catalog.