Watch List notes:

WORLD COINS, FRANCE, Charles X, Silver ¼-Franc (2), 1829-T, Nantes, head left, rev crowned arms (Gad 353; KM 722.11). Both mint state, lustrous and toned, one with slight ghosting of the reverse on each side of King's face, very rare in such high grade. (2)
mintage of 6481 pieces only

Estimate: £200-250