Does anyone recognize this glass vase - Jan Sylwester DROST (Poland)

Hi All.  Does anyone recognise this clear glass vase.  I'm pretty sure it's not Czech (but could be completely wrong on that).  Maybe German or Scandinavian.  It's pressed glass with a mottled finish and a raised relief (bobbles) design on both sides.  Measures 18 cms tall x 18 cms wide x 6.5 cms deep and weighs 1.4 kg.  I've added a number of images below and any help would be much appreciated.

FRONT VIEW (SAME FOR FRONT AND BACK)



SIDE VIEW



DETAIL OF DESIGN



BASE

Pukeberg springs to mind, also Walther Glass and has similarities to Iitala Ultima Thule. But I can't seem to find it anywhere

Iittala designed by Oiva Toikka ????

Haven't found an example of it though.

Found it - thanks for the pointer - believe it or not Polish designed by Jan Sylwester Drost in 1975 - part of the 'Asteroid' range.  Look at this link

http://www.collectorsweekly.com/stories/139381-jan-sylwester-drost--asteroid-vase?in=445

Well done, always nice to have a positive ID. I know next to nothing about Polish glass apart from the more recent production from Krosno etc..

Thanks for the help. Started with your suggestion of Pukeberg on Google and eventually (more by luck than skill) found the link. Not a bad £5 charity shop find I think. Pity clear glass appears to be so out of fashion at the moment. Saw a pair of really nice pair of signed 1950s Vicke Lindstrand vases that went for only £30 on ebay recently. Missed bidding myself because I didn't have access to ebay when the auction finished.