Mumu
In the year 294, the Parliament of Patriarchs of the Federation of Windurst created the Mumu to be the official currency of Windurst. Common denominations were Whiteshells for one Mumu, Jadeshells for 100 Mumus, and Stripeshells for 10,000 Mumus
The Mumu was taken out of circulation after The Currency Union of 868. Due to its rarity, it is sought after by collectors.