Picked this up the other day, 3 piece construction.....the metal foot cemented into the body and the cap cemented onto the body. No markings to be found anywhere. The metal foot has a threaded hole in the bottom of it. Could this be some sort of a bizarre standoff? Shown with a CD 152 for size comparison. Thanks for all your responses....this is a U-219 unmarked Thomas transposition.....time for me to get the price guide for porcelain I guess.