Registered cover with 'CRUZ ROJA - PARAGUAYA COMITE CENTRAL' handstamp on front with boxed 'Franquicia Postal Ley 1061' marking alongside franked with 1939 strip of three 100p emerald green 'Flag' issue plus 2 x 1940 10p magenta and 50p turquoise green (SG 526, 540 & 542) tied by CORREO AEREO ASUNCION cds's dated 18 DEC 1943 with registration label on reverse. Addressed to the Red Cross in Geneva, SWITZERLAND. Sent airmail via Trinidad and censored in PORT OF SPAIN with printed 'OPENED BY EXAMINER I.E./4969' censor strip at left. LISBON, PORTUGAL transit cds and Swiss arrival cds on reverse.