Registered, May 31, 1894/Midwinter Fair Station, San Francisco, Cal. In red box handstamp on Midwinter Fair illustrated Office of Executive Committee 1887 2¢ green entire to Prag, Czechoslovakia, uprated with 1¢ Columbian + 10¢ small banknotes, two singles (one with small corner nick), New York exchange etiquette; trimmed into half of indicia, otherwise F.-V.F., the unique discovery of this Fair Station Registry handstamp, one of the most important exposition covers. Estimate  $4,000 - 6,000. $0 (Image)