Cuba 1925 - The 1925, 2 centavos red, perforation 12, Máximo Gómez complete booklet pane of 6 used 20 years later in 1945 on a Registered, censored cover from Havana to New York City, U.S.A. The cover also bears a 4 centavos, Zona Franca de Matanzas perforated stamp to make up for the required postage. Needless to say, an extremely rare, legitimate postal use of a complete booklet pane on cover. This is the only such cover we have ever seen. Complete booklet panes on cover are rare but we have seen another one used to enhance a 1948 FDC of the Congress of Pharmacy stamp (That cover is also for sale at this time, in Category 12). But this is the only legitimate postal use we have ever seen. Cleanly opened at the left margin, where the EXAMINER's tape had been previously applied. A very, very, rare cover.