WWI Early German research

I didn't get any painting done today but collected some reference pictures to help me to quickly paint up my WWI german force. Could be handy for someone or my own future use.

 

There seems to be a lot of debate as to whether the colours of the early uniforms were green or more blue. After reading a few books and asking around I found out that they are indeed a grey-blue. Especially early war. The green wasn't adopted until later.