Collection of philatelic items issued on the occasion of the Grand Duke and Grand Duchess' silver wedding anniversary of Feb. 14, 2006.  The collection consists of a MNH souvenir sheet, a sheetlet of ten MNH stamps, a block of 4 stamps cancelled with a special postmark on Feb. 14 and the official FDC cover for the event issued by the Post Office on Feb. 7, 2006.