Central Bank of China, 1923 "Pak Hoi" Specimen. China, $1, P-171Ad, Greenish-black on m/c face (Listed as dark green), SYS at center, Brown back. Specimen banknote. Red specimen overprint, "00000" serial numbers and POC. Gem uncirculated with large even margins. Never issued. ABNC. Rare banknote. Central Bank of China, 1923 "Pak Hoi" Specimen. China, $1, P-171Ad, Greenish-black on m/c face (Listed as dark green), SYS at center, Brown back. Specimen banknote. Red specimen overprint, "00000" serial numbers and POC. Gem uncirculated with large even margins. Never issued. ABNC. Rare banknote.