Romania 1999 The 20th Century (3rd series) : Science/Scientists/Technology 4 value set depicting Alexander Fleming - Penicillin, Harold Clayton Urey - Heavy Water, Beaumont Deep Sea Oil Well (USA) and "Swords into Ploughshares" Statue - in superb u/m (mnh) condition. Excellent country, chemistry, physics, oil exploration, energy, power, nuclear, medical, inventors, people thematics. If you cannot see the topic/thematic you are searching for in my shop, please do not hesitate to request that I send up a selection of items to ebay which suit you better as I have huge stocks!