1941. PHILIPPINE ISLANDS. Fine small MANILA SINGAPORE FIRST FLIGHT cover with 4 + 12 C AIR MAIL overprints AIR MAIL and 4 C overprinted COMMONWEALTH cancelled MANILA MAY 9 1941 PHILLIPINES. Via CALIFORNIA CLIPPER. Reverse clear arrival postmark SINGAPORE 10 MY 1941. Unusual first flight. Censor cancel PASSED FOR TRANSMISSION 81.