The original poster, in large format, was printed on both sides for the back-lit panels of JC Decaux bus shelters.
See the back of the poster on the 2nd photo below.
In the 1960s, Claude Taittinger took over the family business in Champagne and renewed the brand's image with elegant and effective advertising campaigns. One of the most famous examples of this new communication style can be seen in this poster designed by Patrick Arlet for "l'instant Taittinger", which became a cult as soon as it was released.
In the foreground, a champagne glass allows us to admire in its transparency a woman in a sheath dress, evoking the beauty of Grace Kelly. In fact, according to the Taittinger house itself, the model does not represent any famous person, even if the artist may have been inspired by Claude Taittinger's wife: "The wish was to create an image of refinement and haute-couture, leaving everyone's imagination free rein".
The simple and sensual lines, the contrast between the black dress and the golden-yellow background, reminiscent of the nuances of champagne, evoke the elegance of the Art Deco posters. Taittinger adopts a stylised image, light as champagne bubbles, with Hollywood glamour.
This original poster for the "l'instant Taittinger" is very rare today.