Here are four fairly crude porcelain signals of various U-numbers (unknown to me) in different shades of blue. One is so dark it's almost black. The lightest blue one has the only marking: incuse PINCO-U on the dome. [id=394315063] This one also has the only damage I can find, and it's on the inner skirt base. [id=394315108] As shown, there is a chip from the factory that was glazed over before firing, but there is also a small post-production flake off that chip. Also, the glaze on this piece is not glossy like the others: it almost looks like the salt glaze I see on some stoneware, but not so rough. I'm asking $10 apiece plus shipping. Or you can take all four for $40 shipped in the US. Thanks for looking.

The Pinco is SOLD. Buy the remaining three for $8 per plus postage or $25 for all three shipped in th US.