Circa 1971 Black & white real photographic PPC of 'Galapagos Flamingos' franked on message side with 1971 2s on 2s emerald 'Provisional' surcharge on REVENUE issue and 1s 30c 'Butterfly issue (SG 1424 & 1388) tied by two strikes of undated CORREO DEL ECUADOR GALAPAGOS ISLA SANTA CRUZ 'Tortoise' cancel in blue. Addressed to HOLLAND.