Switzerland's First Sheet - 1934 Scarce Mint Lightly-Hinged Sheet

Sold at the opening of NABA, the 1934 Swiss National Philatelic Exhibition in Zurich, collectors quickly snapped up the small printing of 50,000 sheets. Many were used on first day covers, making it one of the most difficult 20th century Swiss issues to find in mint condition. (Switzerland #226 sheet of four)