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airmail
1967, Sep 2 50th Anniversary of the First Argentine-Uruguay Airmail Flight issue unwmk p. 13.5
| - | 26p | multi |
1967, Dec 20 1967 air issue
| - | 26p | olbrn |
1969, Aug 30 1969 air issue (no perf info)
| - | 26p | olbrn |
1969, Dec 13 National Development Projects issue wmk. Argentine arms & AR
| - | 26p | multi | Central Nuclear Atucha |
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