Might be worth considering asking the seller where they got their attribution. I have nothing more helpful in any of my books, and couldn't find any websites with Aseda catalogues. I did think it was strange that yours and the etsy piece are the only ones I could find in that colourway for Aseda or for Bo Borgstrom, although there are examples in the reverse of blue over green, but in different shapes. I couldn't locate the listing on eBay......do you have a link for it?