Corinphila Auction 291-297 Day 2

First UK Aerial Post London-Windsor Trade Advertisements 1911 (Sept. 9): 'Royal Aero Club' - dark brown card franked with King George V ½ d. green cancelled by "FIRST UNITED KINGDOM/AERIAL POST LONDON SP 9" addressed to the "Irish Aero Club" in Dublin with machine cancellation "Dublin 6.45 PM SEP 13 - 11" on picture side. Small paper adherences of former mounting at lower left and upper right on picture side of card, scarce usage.