1920 : Newspaper on white paper - 2 H. purple            
         
    
        
            
                
            
            
            
                1920 : Newspaper on white paper - 4 H. brown            
         
    
        
            
                
            
            
            
                1920 : Newspaper on white paper - 5 H. black-grey            
         
    
        
            
                
            
            
            
                1920 : Newspaper on white paper - 6 H. green-blue            
         
    
        
            
                
            
            
            
                1920 : Newspaper on white paper - 8 H. pale green            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 9 H. yellow            
         
    
        
            
                
            
            
            
                1920 : Newspaper on white paper - 10 H. red            
         
    
        
            
                
            
            
            
                1920 : Newspaper on white paper - 12 H. blue            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 15 H. lilac            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 18 H. blue-green            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 20 H. orange            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 30 H. yellow-brown            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 45 H. green            
         
    
        
            
                
            
            
            
                1920 : Newspaper on white paper - 60 H. lilac-red            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 72 H. lilac-brown            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 90 H. purple            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 1,20 K. vermillion            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 2,40 K. pale green            
         
    
        
            
                
            
            
            
                1921 : Newspaper on white paper - 3 K. grey