Liebig's Extract of Meat Company was established in London by Justus Freiherr von Liebig in 1865. The company produced over 11,000 different advertising trade cards worldwide from 1870–1975.

Liebig Serie 309: Aerei (Planes) cards were distributed in 1969 by Compagnia Italiana Liebig S.p.A. of Milan. The Sanguinetti Catalogue series number is 1834. The Aerei series was distributed in six-card sets bound in a paper strap. The card text is printed in Italian. The card backs advertise broth and risotto products from Liebig.

The Aerei series features concept illustrations of the Boeing X-20 Dyna-Soar spaceplane and Bell D-188A fighter jet. An artist rendering of the X-15-1 (56-6670) experimental aircraft is depicted on card #5. NASA developed three of the experimental aircraft to investigate problems that pilots would encounter near the edge of space. The X-15-1 and X-15-2 were first piloted by Scott Crossfield in 1959. The X-15-1 is displayed in the Steven F. Udvar-Hazy Center at Washington Dulles International Airport.