Watch List notes:

BANKNOTES. CHINA - FOREIGN BANKS. Banque Belge Pour l’Etranger, Société Anonyme: Uniface Obverse (2) and Reverse (2) Proof $5, 1 July 1921, Shanghai, red, and Tientsin, dark blue, unperforated and mounted on card stock, ABNC Archive Proofs (P S136, S146). Uncirculated.
(4pcs)

Estimate: US$600-800