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          | SELLOS/STAMPS # 1439-1458 |   
          | 1990-1992 “PROTECCION DEL MEDIO AMBIENTE” |  
        
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          | # 1439-1443 ,  |  
        
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          | # 1439 | # 1440 | # 1441 | # 1442 | # 1443 |  
        
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          | # 1444-1448 ,  |  
        
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          | # 1444 | # 1445 | # 1446 | # 1447 | # 1448 |  
        
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          | # 1449-1453 ,  |  
        
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          | # 1449 | # 1450 | # 1451 | # 1452 | # 1453 |  
        
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          | # 1454-1458 ,  |  
        
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          | # 1454 | # 1455 | # 1456 | # 1457 | # 1458 |  
        
          |  |  
          | # 1439-1443 ,  |  
        
          |  |  
          | # 1444-1448 ,  |  
        
          |  |  
          | # 1449-1453 ,  |  
        
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          | # 1454-1458 ,  |      |