Air Mails. Over the past ten years GB commercial mail from the 20th century has been one of THE growth areas with increasing collector demand. Air mail carried by aeroplane from the 1911 Aerial mail onwards (see separate section on website), pioneer flights, the King George V Seahorse issue on cover, GB related Zeppelin mail, King George VI high values, QE2 Castle issues, combinations, destinations and others are collecting areas in which can always offer interesting and changing stocks from a few pounds to thousands.