Here's An Interesting WW2 Airgraph .
An airgraph is a photograph made from a much larger form. The orginal form was photographed in a special Recordak machine. The negative microfilm was then transported by aeroplane to the appropriate processing station. The airgraph "positive" was then produced from the negative microfilm. The resultant airgraph was folded and usually placed in a special "window" envelope. The airgraph then entered the postal system and was delivered in the usual way.
This Airgraph wea Sent by Lieutenant Creer Lancashire Fusiliers To His parents in Churchtown Southport . interesting WW2 postal history & correspondence .