Watch List notes:

INDOCHINA.

Colonie française, 1887-1954. 1/2 Tael (1943). ESSAI uniface in silver. Obv. "Fu" caractere (wealth). Rev. Word ESSAI punched several times on bottom. Lec. 321a (plate coin). AR. 16.15 g.
Unique, the single one available on the market.
PCGS SP 64