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25th Anniversary of Posts and Telecommunications Research Institute issue of Vietnam


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Short desc: 25th Anniversary of Posts and Telecommunications Research Institute

Issuer: Vietnam
Date: 9/17/1991
Occasion: Posts and Telecommunications Research Institute founding
Number/Year: 25


Consists of 2 stamps: (See stamps as list)

200d perf=13
3500d perf=13.25x12.75