1840, Hesse-Darmstadt, Louis II. Silver ½ Gulden Coin. Mint Years: 1840 References: KM-307. Denomination: ½ Gulden Material: Silver (.900) Diameter: 25mm Weight: 5.23gm Obverse: Head of Louis II as Grand Duke of Hessen left. Reverse: Value (½) above denomination (GULDEN) and date (1840). All within wreath. The Grand Duchy of Hesse and by Rhine (German: Großherzogtum Hessen und b ...