CHINA--REPUBLIC. Bank of China. 1, 5 & 10 Yuan, 1918. P-51p, 52p & 53p.4 pieces in lot. Back proofs. Kalgan. A lot which pairs well to the previous offering of notes from this series in proof form. The lot shows with all exhibiting the Kalgan branch name. One and Five Yuan seen on loose India paper while the 10 Yuan back design is mounted to card stock. Also included is a 10 Yuan back proof in black inks with a Chekiang branch name mounted to card with some glue bleed through.Uncirculated