Nifty cover from the outbreak of World War II. Cover was sent to Rev. Francis Felip, a Salesian missionary priest serving in India.  New York World's Fair postmark.  Most significant is the Not Opened By Censor mark. It is a Morenweiser Type 8 NOT OPENED BY CENSOR oblong censor steel stamp from the Mumbai Censor Station with station code D, struck by the examiner having chop number 2.  The mark when used in Mimbai CS from May 1940 to February 1941, has been recorded with censor numbers ranging 1–17 but all but 10% were marked by censor No. 3, making this mark particularly rare.  The mark, which was applied to mail deemed innocent...bank mail, missionary mail, etc., was in use less than a year.