Proof Silver Crown issued in 1992 by Western Sahara (formerly Saharawi) to commemorate the 500th anniversary of Christopher Columbus' voyage of discovery in 1492, this unique proof silver Crown features a Spanish Galleon imposed upon a map of the Canary Islands with a course reckoning showing the westward venture across the Atlantic and into the unknown. The whole of the obverse of this lovely coin is entwined in rope-work and one simple knot accentuating beautiful Arabic Script.