Morocco, Mohammed V, 10 Francs
AH 1352/1933 - Paris - Pré-série
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Date of the Hegira calendar in a decorated star, surrounded by the caption in Arabic and French.
Value in a circled double square, caption in Arabic and French around it.
Graded PCGS SP62. Reeded edge. Back of the slab slightly damaged by the use of solvent. Very rare and very interesting variety in aluminium-bronze, not mentioned in Jean Lecompte's book on colonial coins. Pattern coin for the 10 francs coin, whose circulating strikes were in silver. Specimen of the highest rarity, possibly the only existing exemple, seems to be the only example seen in sales for this type over the last two decades.
7.21 gr
Aluminum bronze
Bronze (not to be confused with brass, although usage of the two terms varied in times of yore) is an extremely ancient alloy of copper and tin with origins going back to the period around 2,000 BC. Also known...wait for it...as the Bronze Age (who would have guessed?)
In contrast, the addition of the third wheel, aluminum, is a far more recent development, as the technique for extracting aluminum from bauxite was only perfected in the 19th century.
The proportion of aluminum used for this extremely corrosion-resistant alloy is generally 15%. Small quantities of other materials such as magnesium are also sometimes added.
Its is frequently used for coinage.
