GREAT BRITAIN POSTAL HISTORY 1917 First U.K Aerial Post
Sale No: 48
Lot No:401
Symbol:
1911 (Sep 9) London to Windsor envelope proof printed in pale red, the enclosed notepaper in the same colour, posted to New Zealand, a KGV 1d tied by the London Aerial Post c.d.s code "3". A rare postally used proof, probably unique to a foreign destination. Photo on Page 58. (Image1)