could be wrong but appears this one has found its way, via a charity shop, to ebay - and is listed as a 1930's lamp base from the Walther factory - it is identical right down to the location of the imperfection.
On Pamela's glas-musterbuch there is a seated nude with candle holder showing on page 16 of the 1935 Walther catalogue........http://www.glas-musterbuch.de/Walther-1935-Sonderangebot.22.0.html
........although it differs a lot from this one and the eaby listing, neither of which are a match for the catalogue example.
I can't see any other seated nude lamp bases from Walther in any of the 1930's catalogues - or in the 1925 or later ones. Perhaps, in view of the range of Walther figural centre pieces - plus the roughly similar 1935 seated nude - an assumption has been made, but from what I can see the ebay listing is not Walther.
Is anyone else aware of Walther seated nude lamp bases that I might have missed.