Its a for a specialist leader aka a sonderführer. They were civilians drafted into the army to fill a space were the military did not have a trained person available. They were given officer ranking but had not been on the officers course so were distinguished by separate insignia.
Here is a thread with more info.......
I'm guessing these are often later caps?
Looking for WWII U.S. dog tags
Not necessarily the ranks was established as early as 1938 I think.............they knew what was coming and started drafting specialists long before kick off !
Another real good example is the use if interpreters especially in Africa.
Thank s very much for clear answer
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