There is no evidence of any badge being fixed to this helmet. The top photo is of the front. As you can see no grommet hole.

So if used by the Navy would they have been white?

Always interested in buying NSDAP collar tabs and Eickhorns of any sort
I collect badges and groups for the Polish Army in the West (Polskie sily Zbrojne Na Zachodzie) 1939/47 especially unit badges
Contact me directly on [email protected]