Barbados. 1939. Air Mail envelope addressed to New York bearing SG 253, 4d black/grey (4) tied by 'G.P.O./Barbados' double ring with 'On His Majesty's Service/Opened by Censor/Post Office/3' censor label with 'By Air Mail/Par Avion' label on face. Very scarce 'Provisional' label from Barbados.