Yep, beat mine by 19 years Collin

(great cover and bevelled star bobgggg

)
Wiki
Interinsular = inter island
In July 1858, the governor of the Bahamas, Charles John Bayley, wanted to replace British stamps circulating on mail in the colony. In his mail to British offices, he submitted a design of a round stamp illustrated with two main productions of the islands; a pineapple and conch but, Perkins, Bacon & Co judged that such a stamp design would be too difficult to print and to perforate.
The printing company proposed a project derived from others Chalon issues: the oval of the portrait should be reduced in size and two little ovals appeared for the two Bahamian products. A banderole precised the use of the one penny stamp: "INTERINSULAR POSTAGE".
