The Swissmint Patterns. 20 francs 2025 B, Bern. Lake Maggiore. SILVER PATTERS. Swiss cross with stylish landscape. Value below with "E" symbol for ESSAI / Topographical map. 20,00g. NGC PF69 ULTRA CAMEO. (8806430-004). Extremely rare, only three species struck. Technical informations from Swissmint: For the definitive strike, the matt finish of the ‘Lago Maggiore' lettering has been modified to make it clearer and create greater contrast.