I want to know the answer to the following question:
At the start of the Franco-Prussian War, what was the age of the Dreyse gun's design?
All the background I'm provided with is that "The army was still equipped with the Dreyse needle gun of Battle of Königgrätz fame, which was by this time showing the age of its 25-year-old design.". Is that enough to answer the question?
Answer: yes