They would be used by the Freikorps and later modified using the chinstrap and helmet liner traditionally seen in most German combat helmets (and here) in the Second World War. From observation multiple layers of period paint can be found on the helmet from being re-issued. It appears that the first re-issue had two sets of decals either painted (very early) or transfers (typical) and the most visible layer is hastily put on likely due to being re-issued to the Volkssturm. Made up of young boys and old men they were often ill equipped and outfitted with dated helmets and uniforms that were in short supply.
If you should have any more questions or require more photos please let me know and i'd be happy to fulfill you're request. Please feel free to look at some of the other items I have for sale as I specialize in rare and unique pieces ranging from the early 1800s to the Civil War to the early 1900s and to World War Two. Focusing on Militaria Medical and the Photography. The item "WW2 German Austrian M16 Transitional ReIssued Rare Double Decal Helmet Stahlhelm" is in sale since Tuesday, September 11, 2018. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Germany\Hats & Helmets". The seller is "strangerthingsantiques" and is located in Georgetown, ON. This item can be shipped worldwide.