Date entered into revision: May 26, 2005 Technical characteristics Nominal Metal Mass, g Diameter, mm Quality category carbuvannya Gurt Actual circulation, pcs. 2 nickel silver 12.8 31.0 special uncirculated corrugations 30000 Series: Ukraine's main pledges Assigned to the 75th anniversary of Kharkiv National Aerospace University IM. M.Y. Zhukovsky, history of which is completely tied to the development of aviation industry and science. One of the most important pledges, on the basis of the Vlach design bureau, which were broken up by the authorization of Professor I. Neiman, who were serially released at the aviation factories and exploited on the passenger lines.