British Guyana: Post-independence Use of 1960 Aerogramme

British Guyana 6 cents aerogramme NGK#11, issued 1960, commercially used in 1971 post-indepedence, uprated with a cut-out from another aerogramme and a 3 cents Guyana stamp to pay the 15 cents aerogramme rate at the time of posting.

Printed letterhead of the Geological Survey Department on the writing panel.