Struck by the Argor-Heraeus SA Mint, they are not a Swiss legal tender coin.
Obverse: features Helvetia sitting on a throne holding a sword and shield, the reverse represents the formation of the "Everlasting League" in 1291, when the forest districts of Uri, Schwyz and Unterwalden as they pledge themselves to mutual defense, in the Rütli meadow in Uri. This was the foundation of the Swiss Federation.
This set is 1.85 troy ounces of 999.9 pure gold. The ½ Oz. coin, ¼ Oz. coin, and 1/10 Oz. coins
Obverse: HELVETIA below Helvetia""
Subject: Rutli Eternal Pact
1) Diameter: 32 mm
Note: 6,585 pieces were struck at Argor Mint and 1,500 pieces were struck by Huguenin Freres.
2) Diameter: 28 mm
3) Diameter: 22 mm
4) Diameter: 18 mm
Look at my 100% Positive feedback and bid with confidence!