The Swissmint Patterns. 20 francs 2025 B, Bern. Jean Tinguely. SILVER PATTERS. Head of Jean Tinguely. Value below with "E" symbol for ESSAI / Wheels and mechanisms. Name and year of birth of the artist in collage style above. 20,00g. NGC PF70 ULTRA CAMEO. (8400354-035). Extremely rare, only three species struck. Technical information from Swissmint: On the reverse, the matt finish of one element has been aged for the definitive strike. Jean Tinguely (1925–1991) was a Swiss artist known for his kinetic sculptures and poetic machines. Born in Fribourg, he left a significant mark on the art world with his playful and critical approach, creating from recycled materials moving works that combine sound, mechanics, and aesthetics. His iconic creations, along with his collaborations with other artists like Niki de Saint Phalle, established him as a key figure in contemporary art.