The tenon/spiggot came off of this when I was about 3/4 done turning it green. I threw it in a corner and looked at it every now and then for months, each time I almost threw it into the burn pile.
During a thorough shop cleanup, I found the bottom part. The wood had changed shape, but I managed to get it back on the lathe, never expecting to have enough wood to get it finised.
I turned the inside first, then jam chucked it to do the outside. All I did was true it up, and it held together, and it was REALLY thin (and round).
Diameter: 8 3/4 inches
Height:4 3/8 inches
Finish: Water Based Poly