Art Pottery Double Gourd Vase

This is not really my type of thing at all but it called to me across the charity shop (know the feeling?) so I had to buy it.  An elongated double gourd vase, 11.5 inches tall, with jun and copper red glazes.  Beautifully potted, apparently in a white earthenware.  Doesn't appear to be eastern because of the lack of footrim and the glazed base.  No markings.  Maybe British (Ruskin?) or American (Fulper?) or Belgian (Thulin?) - but you would expect all of these to have maker's marks.  Expert help, please.

I have seen that base a lot over the last few years. The base its almost like a cut through of a tree trunk with is circular pattern. I used to believe these were Austrian but recently I have been finding the odd bit of information about Staffordshire potteries between 1900-1925 that would indicate some of the short lived companies produced versions of what was popular at the time but with no marks. Devonmoor could be a strong option too, they made some stunning glazes in the 20's with most of it unmarked and sadly unattributed these days. Not sure you will ever have a firm attribute but its from the period 1905-1928 (the great depression kind of ended many companies and styles) , almost certainly English and a nice thing.

Many thanks. That's very exciting! No wonder it stood out among the junk in the charity shop. Is the exhibition catalogue that you refer to available online?

As far as I can tell my vase is undamaged except for some quite prominent crackles in the glaze.