This is an original Post-war illustration drawing, hand-painted with gouache on Arches Velum paper by French artist C. Villars (France - 20th Century). The poster project features an airplane propeller and the earth in the background, with emphasis on France and South American countries. The drawing was created for an airline company named STAR. The illustration is signed C. Villars in the bottom left corner. 
This image was probably later printed in a larger size for ad posters, but this is the original painting by the poster designer.
The drawing is adorned with a modern black wood frame with a silver accent and an off-white matte with glass protection. 
Measurements: 
With frame: 14 in. wide (35.5 cm) x 14 in. high (35.5 cm).
Opening view: 6.50 in. wide (16.5 cm) x 7.88 in. high (20 cm).
Drawing size: 4.75 in. wide (12 cm) x 6.13 in. high (15.5 cm).
Please check our storefront for more drawings from this artist. Check also the last ambiance pictures for ideas of grouping.
About:
C. Villars (20th Century) was a French painter, decorator, and illustrator who regularly contributed to French magazines for illustrations and ads. He is known for his uniquely elegant style with Art Deco and Modern influence on decors and costumes for French companies, especially aviation, and tourism.