ADEN 1940 No.6 CENSOR to SWITZERLAND BANK EMBOSSED FLAP ENV 3A + 1/2A STAMP TIED

National Bank of India Camp Aden embossed flap envelope to Geneva Switzerland; KG6th 3A + 1/2A franking; Aden cancel; one stamp tied by Passed Censor No.6 boxed in purple.  Fine used.