MIDDLE EAST FORCES CIRCULAR CENSOR MARKERS

[Ross Debenham]

I attach a scan of the rear of a cover from FPO 120 in Palestine to Egypt, censored upon arrival in Egypt by Base Censor. My enquiry is, what was the usage of the circular 3 stamp. I believe it was applied in Egypt and believe at least numbers up to 124 were used. WAs it a way of identifying the Base Censor? Hoping members can assist.