Switzerland 2013 Goldvreneli Souvenir Sheet on Folder, Used - LOTTO/37834USwitzerland 2013 Goldvreneli Souvenir Sheet on Folder, Used

5/9/2013 SWITZERLAND - The Goldvreneli in gold (Cat. Unificato BF/54 - Yvert F2236). Souvenir sheet used with the first day of issue postmark of Bern, with its certificate, on the official Swiss Post folder: never put on sale, sent only to subscribers of the philatelic office, in a reduced printing. Uncommon, and with the Post's covering letter - Lotto/37834U