Hi Everybody!
Chuck Anderson here!!
There's a really great website called Rank Insignia of the World. I believe this site also covers WW1 rank insignia for many nations (as well as current rank insignia.) To visit this website, please go to:
http://www.rankinsignia.info
The illustrations are excellent and are in colour! I hope that you'll find this website interesting!
Chuck Anderson
USAFWO1_1975@military.com