Ed-
Any Swedish, Austrian, or Belgian 9mm BL could have been used by the Germans, but there are a few headstamps that really fit the bill:
-Austrian H 5 18
-German S / 6 / 16 / /
-Belgian F N 08
-German RWS 1932
The above are all believed to have been used by German military forces. There may be others I don't know about, but these are in my collection.
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