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10 francs Montesquieu épreuve de contrôle
| Issuer | Monnaie de Paris |
|---|---|
| Year | 1989 |
| Type | Log in to see details |
| Value | Log in to see details |
| Currency | New franc (1960-2001) |
| Composition | Log in to see details |
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| Diameter | Log in to see details |
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| Obverse description | Log in to see details |
|---|---|
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| Reverse description | Log in to see details |
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| Reverse lettering | LIBERTÉ ÉGALITÉ 10 F 1989 FRATERNITÉ |
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| Mint | Monnaie de Paris |
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| Additional information |
Épreuves de contrôle are internal checking pieces struck by the Monnaie de Paris to verify die alignment, depth, and overall quality before authorizing full production runs — they were never intended for circulation or public sale. Lead's malleability makes it ideal for this purpose, capturing fine detail without the hardness that can mask subtle die faults. The 1989 Montesquieu issue commemorated the bicentennial of the French Revolution, a series that generated considerable institutional interest and correspondingly careful quality oversight.