1935 Amelia Earhart, 20c lake with additional "MUESTRA" (Specimen) overprint, l.h., v.f., with 1970 Philatelic Foundation certificate (Cat No. C74S) (Image)

Est.US$300

1939 SARABIA, registered cover from Mexico City, additionally franked with 20c, both tied by "Servicio Aereo Mexico D.F. 23.May.39" cds, with violet flight cachet, registration pmks and New York arrival on reverse, v.f. (Sanabria 151) (Cat No. C93A) (Image)

Est.US$150

1960 20p carmine & green, upper left sheet corner margin block of four, n.h., v.f., cat. $400 (Cat No. C249) (Image)

Cat. $400, Est.US$200