First off, I apologize for the poor photo quality. Porcelain doesn't back light too well, and there's no direct sunlight to really illuminate the piece by the time I get home from work at quarter to 6 - too many trees, you see.
Anyways, this is another of the pieces which came out of the box of insulators the fellow at the junk store gave me. It's approximately 3 1/4 inches high, and approximately 4 1/8 inches wide. It's triple petticoat, with the firing rest being on the middle of the three skirts. The glaze is dark, and appears like a speckled reddish chocolate brown when in direct sun. It appears to have faint mold lines on either side of the saddle groove. I can't remember if this means dry or wet process porcelain... Dry I think.
If anyone could help me, please do so! This piece, along with every other in existence, intrigues me irrationally!
Thanks to Dave Kingston, and Clint Gaylord for helping me figure out that it's a U-348. I'm assuming, based on the glaze, and the unglazed pinhole, that it's a Pittsburgh piece. Thank you!