Airmail cover franked with 1931 20c brown AIR issue, 1942 ½c orange 'Red Cross Fund' TAX issue and 1943 5c bright blue 'Postal Employees' TAX issue (SG 380, 458 & 472) tied by HABANA cds's dated MAR 28 1944 with two strikes of CZECHOSLOVAK FIELD POST 4V 1944 cachet in blue on front & reverse. Addressed to 'Pte Stephen Mayer R/1909 Signals Squadron, G.P.O. Box 226, London E.C.1. England' the undercover address for the Czech Army in Exile. Censored in Cuba, the USA and UK with various censor strips and marks. Very scarce.