Cuba 1838 stampless folded letter cover showing a scarce postmark from Fernandina de Jagua consisting of a two-line back postmark. Fernandina de Jagua (current name Cienfuegos) was a sub-administration of the Havana Post Office at this time. This cover was mailed to Havana. (Image)

Cuba 1838 stampless folded letter cover having a prepaid postmark “Matanzas Franco.” It was a sub-administration depending on the Principal Administration in Havana. Appears to have been in an exhibit. This cover was mailed to Havana. (Image)

Cuba 1823 stampless folded letter cover from Puerto Principe which was the capital town of the old Central Province. Today it is called Camaguey. Stamped in red “Puerto Principe” Appears to have been in an exhibit. This cover was mailed to Havana. (Image)

Cuba 1831 folded letter cover from Trinidad to Havana. Trinidad was a sub-administration from Puerto Principe, Cuba. A lineal mark in red for the town in on its front. Appears to have been in an exhibit. (Image)

Cuba 1854 stampless folded letter cover from Havana to Paris via England. Carried by the British Postal Agency at Havana. The town and date postmark having a diameter of 25mm was used between 1848 to 1865. This postmark was applied on the reverse of every cover handled by this Agency. Appears to have been in an exhibit. (Image)

Cuba stampless folded letter cover canceled in May,1834 from Havana to Boston via New York showing the New York receiving postmark of June 2 and with a “Ship” mark. Appears to have been in an exhibit. A dynamo combo of Ship and Cuban postal history. (Image)

Cuba 1830 stampless folded letter cover from Havana to Brooklyn, New York having a Philadelphia receiving and “Ship” marks. Appears to have been in an exhibit. An interesting example of Cuban postal history. (Image)

Cuba 1822 stampless folded letter cover from Havana to Maine having a "Ship" cancel and an April 17 New York receiving mark. Appears to have been in an exhibit. (Image)

Cuba stampless folded letter cover from Havana to Madrid, Spain. Carried by Sea Mail Enterprises having a “Habana/Franco” mark. This cover shows the franking mark of the members of the Spanish Cortes. It was cancelled in December 1837. Appears to have been in an exhibit. (Image)

Cuba 1900 cover cancelled under military rule from a US soldier at Pinar del Rio and addressed to Vermont. It shows on its reverse Havana and Essay Junction receiving cancels. Appears to be from an exhibit. (Image)

Cuba 1848 stampless folded letter cover from Havana to Paris via England. Carried by the British Postal Agency at Havana. combo of Cuban, British, and French postal history (Image)

Cuba 1940 large FDC having the scarce center block of the C32 Centenary of the postage stamp. A must for any topical cover collector. (Image)