This exceptional original poster from the landmark 1998 retrospective "Les Lalanne à Bagatelle" captures a defining moment in the narrative of 20th-century design. The image immortalizes the iconic Moutons installed in Parisian gardens, evoking the surrealist fusion of art and nature that established the duo's reputation. However, its true status as a collector's item lies solely in its provenance: it is hand-signed by both creators. The joint presence of François-Xavier Lalanne and Claude Lalanne's signatures lends this work critical distinction and extraordinary rarity in today's market. While unsigned copies exist as mere ephemera, this example—personally signed during the period that marked the international resurgence of their careers—transcends its original function to become an irreplaceable historical document. It is a unique opportunity to own a physical, direct, and authenticated connection to the creative legacy of two of the most influential figures in modern French art. This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution