ADDENDA^ 

 UNITED STATES 



GOVERNMENT POSTAL ISSUES. 

 Bureau op Engraving and Printing: 



No watermark. 

 1918: 

 Perforated 11. 



3c. Deep violet, Type II.* 

 3c. Blue violet, Type II.* 

 3c. Light violet, Type II.* 

 $2. Orange vermilion and black.* 

 $5. Deep green and black.* 

 The $2 and |5 denominations were printed in sheets of 100, divided into 

 panes of twenty-five by vertical and horizontal guide lines. Vertical 

 and horizontal pairs exist showing' the guide line between stamps, 

 also blocks from center of sheets showing the crossed guide lines betv.(>en 

 stamps. 



Airmail. 

 1918: 

 Perforated 11. 



6c. Deep orange.* 

 6c. Red orange.* 

 16c. Green.* 

 16c. Deep gi'een.* 

 24c. Carmine and blue.* 



Inverted medallion, 

 24c. Carmine and blue. 

 The air mail denominations were printed in sheets of 100, divided into panes 

 of twenty-five by vertical and horizontal guide lines. Vertical and horizontal 

 pairs exist showing the guide lines between stamps, also blocks from center 

 of sheets showing the crossed guide lines between stamps. 

 Imperforate. 



3c. Blue violet, Type II.* 



Rotary press coil stamps. 



Coiled horizontally, perforated 10 vertically. 

 3c. I>ight violet. Type II.* 



Surface printed by offset process. 

 Perforated 11. 



Ic. Light gray green.* 



3c. Dark violet. Type III.* 



3c. Deep violet. Type III.* 



3c. Violet, Type III.* 



3c. Light gray violet. Type III.* 



3c. Gray \dolet. Type IV.* 



3c. Lavender, Type IV.* 



3c. Bright violet. Type IV.* 



3c. Purple, Type IV.* 



1 Owing to delays, caused by the war and war work, this catalogue appears a year later than was 

 originally intended. An addenda has therefore been added giving the postal issues for the year 1918. 



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