National Bank of Viet Nam, ND (1956) Issue, Progress Proof. National Bank of Viet Nam, ND (1956) Issue, Progress Proof.South Viet Nam, ND (1956), 50 Dong, P-7p Unlisted Essay progress face proof, printed on white paper with large margins uniface, purple. PMG graded Gem Uncirculated 66 EPQ, Extremely rare production proof from Security BNC Archives. SBNC.
Estimate: 3100-6200 HKD