colors of the German shells

[hasag]

Seeking information and documentation on the colors of the German shells 20x138B 20x82 20x80 somebody could help me?

Thanks​

 

[Le Hussard]

Hello.
colors of the German shells .
Good document here
20 x 138 B
http://www.histavia21.net/amaviapag/20x138bDIA.htm