56 bulletin 105, united states national museum. 



Officially Sealed Letters. 



National Bank Note Company: 

 1877: 

 Perforated 12. 

 Dark brown. 

 Deep red brown.* 

 American Bank Note Company: 

 1879: 

 Thin hard paper. 

 Brown.* 

 Dark brown. 

 Yellow brown. 

 Red brown. 

 Soft porous paper. 

 Deep brown. 

 Yellow brown. 

 Government Printing Office: 

 1888: 

 Typographed. 

 Light brown.* 

 Brown. 

 Chocolate. 

 Bistre brown.* 

 Gray brown.* 

 Rose brown. 

 Imperforate horizontally. 



Bistre brown. 

 Imperforate vertically. 



Bistre brown. 

 Imperforate. 

 Light brown.* 

 Chocolate.* 

 1891: 

 Rouletted. 

 Light brown.* 

 Bistre brown.* 

 Manufacturers unknown: 

 1889: 



Type set. Imperforate. 

 • Type I. 



Black on pink paper. 



Black on white paper.* 



Type II. 



Rouletted in color. Black on white paper.* 



Type III. 

 1890: 

 Rouletted between. 

 Dark Blue. 

 Black.* 



