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postage
1961, Jul 13
butterflies (1961 Ecuador) unwmk p.
12
1961, Jul 13
Tena 400th issue
1961, Oct 31
Galapagos stations establishment issue ovpted on stamps of
Galapagos Islands (no wmk info) (no perf info)
1961, Nov 2
Opening of Marine Biology Station on Galapagos Islands / 15th Anniversary of UNESCO issue
airmail
1961, Jan 14
1st International Philatelic Congress issue
1961, Feb 27
Amazon Week 1961 issue
1961, Apr 13
100th Anniversary of Tungurahua Province issue
1961, May 25
Hugo Ortiz Garces issue
1961, May 25
3rd National Philatelic Exhibition issue
1961, May 27
100th Anniversary of Los Rios Province issue
1961, Sep 24
100th Anniversary of Re-establishment of "National Integrity" issue
1961, Nov 2
Opening of Marine Biology Station on Galapagos Islands / 15th Anniversary of UNESCO issue
1961, Nov 3
100th Anniversary of the Birth of Remigio Crespo Toral issue
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