TBH when i was trying to research as to what collar tabs were used by the DAK Fg , i found little if any to the actual ones they used .
I was told that they most likely used the standard collar tabs of the DAK , this is what i have done for my DAK Fg uniform , there is proof that they did not wear the Police arm eagle as much as their counterparts in the European conflict , just look at period photos of DAK Fg to see this ., just remember that as a Fg of any branch of the German Armed Services you would try your best to look smart at all times , a trait of the Fg with their discipline which their , and the Allies respected and the Allies at the end of the war utilized to great affect to keep the German POW's in check .
Below is a photo from Chatham Militaria Fair , it was my first time wearing the DAK uniform i can see there is room for a slight improvement

but on the whole i am happy with it .
Mike