It had this kind of tag, i.e. the earliest one in use in RZM regulated items after about 1933/4. The tag illustrated here, however, is from an officer's cap of similar vintage. The Hamburg maker is an absolute rarity for black SS headwear, but the cap in question, which I recently saw, was stunning and quite authentic.

HG_36a[1].JPG (21.47 KB, 2636 downloads)