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On a red field, two gold fishes addorsed (two animals depicted back-to-back), haurient ("breathing" − a fish shown palewise (vertical) and head upwards), and embowed (shown bent, flexed, or curved) – County of Mompelgard, an exclave property that passed by marriage to the Württemberg royal family in 1397; now modern-day Montbéliard, Franche-Comté, France.
Leopold Eberhard of Württemberg-Montbéliard (21 May 1670, Montbéliard - 25 March 1723, Montbéliard), was the last ruler of the Duchy of Württemberg-Montbéliard from 1699 until his death.
Louis Frederick received the possessions on the left bank of the Rhine (Montbéliard, Riquewihr and Horburg) with full sovereignty.
Haughty Otto however soon entered into several feuds: not only with the Anscarid lords of Auxonne and Mâcon, who claimed late Beatrice's heritage, but also with the Counts of Montbéliard, the French Duke Odo III of Burgundy and Duke Berthold V of Zähringen.