Auction #94 WORLDWIDE AIR POST STAMPS AND POSTAL HISTORY

ORIGINAL ESSAYS OF THE FIRST RUSSIAN FEDERATION DEFINITIVE ISSUE BY ARTIST VLADISLAV KOVAL: 1992-95, 10k-100r, complete set of 17 water-color essays, approximate size 110x80mm, neatly arranged on exhibition style pages along with issued stamps in blocks of four (two of each denomination), each page is bearing artist's signs and facsimile, as well as two pages with artist's projects of Russian Federation Definitive issue of 2018 (15 and 11 different values on each page), unique material in nice condition, Est. $7,000-$8,000