Watch List notes:

BANKNOTES. CHINA - REPUBLIC, GENERAL ISSUES. Market Stabilization Currency Bureau: Uniface Obverse and Reverse Proof 20-Coppers, July 1920, unperforated and mounted on card stock, ABNC Archive Proofs; 10-Coppers, September 1923, black, and 50-Coppers, 1915, Ching Chao (P 606, 613, 602b). Uncirculated.
(4pcs)

Estimate: US$200-250