but the Swabian dogs represented two types - one the Swabian herding sheep dog and the TALLER Swabian service dog more of a guardian type and having excellent qualities for war time and police service . They were used to protect the flock against thieving poachers, wild hogs, bear and intruding stray dogs , without the behaviour that you see in other livestock guardian dogs which "become" the sheep through immersion imprinting at critical developmental times (Konrad Lorenz). This kept them multifunctional . (Hoheb Espe)
The Wurttemberger and Swabian (both) (von der Krone) did bring active aggression -- not reactive which was the case in the Thuringian (which Horand/Hektor was). Horand/Hektor and neither of his parents had HGH. The herding blood was brought in through the females .
Max was never the breeder , never had the success that "So" Eiselen had with Horand . So's reputation was well established and there are articles which give credit to So mixing the different regional types . "So" was the man behind von der Krone - Horand/Hektors best stock was under the guidance of So - to "unknown herding stock" so regional - mid German (Wurtemberg / Swabian ?) type. These became foundation dogs. Max could not ever match the quality of these dogs .
More important Max did not heed So's advice to NOT - NOT linebreed on Horand / Hektor , which he did against the advice bringing a very beautiful dog in to the world Roland Starkenburg -- but temperamentally suspect , excused away by Max as having been spoiled and over indulged.
The "other" lines were not mystery unknown lines , they were the creation of different shepherds relying on the excellence of their dog's , as tools, for their livelihood and well being. Above all they had the gift on instinct for the work. They would have been recorded in personal , private records , memory, reputation -- oral history.
PUBLIC registry , the records of breed clubs , were new on the scene. A very good book to read is Bred for Perfection Bred for Perfection: Shorthorn Cattle, Collies, and Arabian Horses since 1800 - Margaret E. Derry - Google Books
Sometimes numbers were created for some of these females , other times it was "unknown" as shrug unrecorded - but you ask the owner and they knew for sure , if at the minimal they knew the performance ability . All you need to do is to thoroughly read the von Stephanitz book with his details about OTHER herding dogs.
You have to include a fourth pillar of the modern german shepherd and that would be Rolf Osnabruckerland -