to London, bearing $1 on 15c. with St John's machine d.s. and with arrival c.d.s. for 17 June" /> Air Mail cover 1919 (12 June) Alcock and Brown successful flight envelope (260x124mm., faults at edges)<I> "By Vickers-Vimy aeroplane mail"</I> to London, bearing $1 on 15c. with St John's machine d.s. and with arrival c.d.s. for 17 June | Christie's