I have an old advertisment where you can see open sights on the rifle, but on my rifle the sight would be in the middle of the writing " Leue & Co ........ ", so i think this one was made by special order without any iron or open sights, eventually for sporting use. Leue&Co was the former firm Leue&Timpe. I dont know if it was made by Leue itself or as an order in Zella-Mehlis / Suhl.