Auction 333-341 Europe & Overseas - Day 6

1906: Essay prepared by the Russian Delegation for the Reply-Paid Postal Stationery discussions, 10 kopek blue & rose on thick straw stock, in Letter-Card format with "Avec Réponse Payée" on one letter-card and the other with "Réponse", both with bilingual French & Cyrillic imprint at base "Détachez la bordure le long du pointillé", separated from each other. In addition a double closed stampless letter card with a reply letter card inside the larger one, also on blue-greyish paper. An extraordinary ensemble Standard Kollektsiya catalogue ES7 & ES8 = $ 2'200 & unprized.