I think that things can get a bit blurred with volunteer shields because some of the foreign units like the Croat, French, Latvian, Estonian started out as Heer units and originally wore regular army insignia together with the appropriate National shield.
Later, these same units were adopted by the SS as part of an overall transfer of control to this organisation, which resulted in a revision of insignia to their new parent group (the SS) who provided them different style badges.
As ever ,however, many of the older recruits preferred to retain their original style shields so variations of old and new would often be present at the same time.
I am not aware of the shield type shown at the start of this thread ever being worn on an SS tunic.
I hope it is original, very little survives of, what I believe to be an outstanding unit, treated appallingly and slaughtered post-war.