Raimey,
this Kettner Advertisement deals solely with his then new adjustable rifle stock which he had registered for a patent.
at the price of 'between 40 and 500 Mark' that seems to have been extremely expensive for the time.
He also says that his adjustable stock is different from the english 'trial stocks' which are only used to find the perfect fit for a shooter and then a stock is made accordingly.
His new 'adjustable stock' is just that: a stock that can be adjusted and then used.
Best regards
Günter
