★ The Guinness World Records book's smallest gold coin in the world ★

SWITZERLAND. Schweizerische Eidgenossenschaft (Swiss Confederation). 1848-present. 1/4 Franken 2020 B (Gold, 3 mm, 0.06 g, 12 h), Bern. HELVETIA / AU 999.9 - OZ 1/500 Swiss cross above value 1/4. Rev. 2020 Facing bust of Albert Einstein sticking out his tongue. KM 180. Very rare, mintage of only 999 pieces. With certificate and in original display box including lights and a magnifying glass. Proof.

At the time of its release, this was the smallest gold coin in the world. Accordingly, it is also listed in the Guinness World Records book.