Switzerland Ballenberg Museum, Year of Invalides, Geological Congress, Aviation, Albert Anker 1981

This Swiss commemorative stamp from 1981 celebrates the Ballenberg Open-Air Museum, the Year of Invalides, and the Geological Congress, featuring aviation imagery alongside a portrait of Albert Anker. The stamp displays vibrant colors, a detailed design, and appears to be in good condition, offering a glimpse into Swiss heritage and cultural events.