俄罗斯 1914/1915 - 邮票 - Two stamps featuring extremely rare and superb varieties. Catalog value: 1,000 euros.
俄罗斯 1916/1917 - 邮票 - A superb block of stamps featuring extremely rare errors and varieties, according to the Mandrovcki
俄罗斯 1919/1920 - 邮票 - A fine selection of Russian Civil War stamps, featuring many errors and varieties, such as inverted