What historical gap exists regarding the precise evolutionary path of the wirehaired coat trait?

The historical records detailing the precise Pointer or Setter infusions responsible for the coat were largely lost during World War II.

Although the Wirehaired Vizsla fits perfectly into the *Canis lupus familiaris* subspecies today, the exact lineage of its defining characteristic—the wiry coat—is partially obscured by historical events. Specifically, many of the recorded details concerning the exact infusions used during its development in the 1930s, which involved crossing with breeds like the German Wirehaired Pointer, were unfortunately lost or destroyed during the upheaval of World War II. This creates a slight uncertainty in the documented history of this specific genetic expression, even though the modern dog's biological placement is certain.