Vietnam block of 6 types

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Issuer: Vietnam
Block in sheet 16126
Date: 7/26/1991 (1991 blocks)
(6, 3 x 2)
1, 1: 200d
1, 2: 500d
1, 3: 1000d
2, 1: 2000d
2, 2: 3000d
2, 3: 3000d