India 1911, First Aerial Post. Special magenta U.P. Exhibition Allahabad cachet tying pair of India ½a KEVII, to England (destinations outside India are rare), with appropriate backstamps including Feb 18 1911 Allahabad and March 10 1911 receiver at destination, open at top with minor cover wear, Very Fine. Estimate  $75 - 100. $0 (Image)