Hello David,
first congratulation to this real fantastic Kaskara, a real treasure.
To determine the age it maybe help to know the following.
Wilhelm Clauberg AG, Waffen-&Stahlwarenfabrik in the Gasstrasse in Solingen, was one of the nine Solingen weapon makers. This manufactory was founded in 1810. First they had two marks, an arrow and a standing knight like yours. 1850 Cornelius Stürmer aquired a new mark, which was a "pipe" and up 1872 this mark was registred as Clauberg mark. So your blade must be before 1872, but I think it's before 1850.
I also have a Clauberg Kaskara blade. The interesting thing here is, that there a nice Takuba handle is mounted. It seems to be an original mounting, but never before I saw a Kaskara blade together with a Takuba handle. I try to post it next weekend.
I hope it helps.
Best
Wolf
www.spearcollector.com