Get-up was considered an old exercise already in 1930s. It was usually called just get-up, or one-arm get-up. There many, many references to the get-up in the old manuals & magazines.
As for "Turkish", one of the very few references I was able to find is from George Hackenschmidt’s Way to Live (1907), "sitting in Turkish style, and getting up with bar-bell". Note that it was often performed from top down and back up.
Old sources have no detailed instruction - we at StrongFirst are thanks to Pavel, Steve Maxwell, Gray Cook, Brett Jones, Mark Cheng, Jeff O'Connor, and many other excellent instructors an evolution: sound, safe, and strong biomechanical movement, progressions for all levels/ages, multiple benefits.
Summary:
- no fairy tales, legit and very old lift
- SFG get-up rocks. Do it.