Charles X (1824–1830). Single-sided reverse proof of the 1825 40-Franc gold coin, A, Paris.

Av. Lisse.
Reverse: Crowned coat of arms of France, between two laurel branches, flanked by 40 - F, below (variant) (date) (mint).
Maz.- - VG.- - Théret/Taillard 3064.a.UR = this specimen!; Pewter - 1.19 g - 26 mm - 12 h
Top Pop: this is the only graded specimen! From an iNumis sale: this is the specimen illustrated on p. 372 of *The Franc, Charles X*.
PCGS MS62 (58336973).
On a thin pewter blank, bearing the year 1825, which was never actually struck! Superb in Mint Condition.