Couple of questions about a WWII cover posted from UK by air to the H.M.A.S. Adelaide c/o GPO - The ship was initially used for convoy escort and protection duties in Australian waters.
I am not familiar with the Dumb Machine “Paid” cancel – any info would be appreciated. Why used and under what circumstances?
Also where was the boxed blue Passed By Censor handstamp applied – likely somewhere in the Australia/Pacific area, but anything more specific? The handstamp is dated 23/2/41 and initialled.
No markings on the back.
For me, this is a somewhat intriguing cover.