Mail to de Laurence originating anywhere other than Africa, the Caribbean, or South America is unusual. This envelope franked with Machin heads was mailed from the Raleigh Street post office in Nottingham, Great Britain.
Unusual example of a Great Britain stamp used abroad, in this case from Nigeria. The crimson 5-shilling stamp shows Queen Elizabeth II and Caernarfon Castle in Wales. The stamp was issued in 1955, but the presence of a ZIP Code in the address (60601) indicates that the envelope was mailed after 1963.
“Land of Iron & Diamonds” freeform, self-adhesive stamps of Sierra Leone advertising the jeweler Harry Winston commercially used on cover. In 1972, Winston paid $2.5 million for the 1000-carat Star of Sierra Leone diamond mined in Koidu, the town where this letter originated.