1826, Switzerland, Aargau (Canton). Billon Silver 1 Batzen Coin. VF Mint Year: 1826 Reference: KM-21. Denomination: 1 Batzen Mint Place: Aargau (Swiss Canton) Condition: Dark deposits, otherwise VF! Material: Billon Silver (low grade silver alloy) Diameter: 24mm Weight: 2.52gm Aargau (rarely anglicized Argovia) is one of the more northerly cantons of Switzerland. It comprises the ...