Scandi items are not one of my main interests, but I thought it would be good to browse the desgnlasi.com site for a bit of education.
However, although it is clearly a very useful reference site, I found it a bit cumbersome to use as nothing within specific categories seems to be in any particular order. And, when I look under the "Manufacturers" menu, there is no entry for "Riihimäki" - but there are items within the site for that maker! Perhaps I would need to scan every entry under the "Designers" menu to locate the "Riihimäki" items??
Anyway, taking my 'IT Quality Control' hat off, when I look at vase 1376 that has been suggested, I think it is not the same as the one queried here. Although similar, the proportions of upper to lower halves are different and the lower half of 1376 is wider than the one queried.