These vases usually have flat polished bases...Emmi knows more than me about WF, but I'm pretty sure this is a dented vase as the shape is right, base and rim finish right, size ok, colour looks ok and these were produced in blue, it's just missing the casing shown in the catalogue. It is'nt that unusual to find the odd variation from the catalogues, but I'll rest my case there and leave it to the WF specialists.