Printed 'The Panama Canal Executive Department Division of Civil Affairs Post Office Balboa Canal Zone Official Business' PENALTY envelope franked with 1941 10c orange AIR issue with 'OFFICIAL PANAMA CANAL' overprint (SG O169) tied by BALBOA cds dated NOV 5 1942. Addressed to COSTA RICA with straight line 'RELEASED BY CENSOR' handstamp on front and arrival cds's on reverse.