Update. I've got the Mannlicher in hand. It had the base of a Lyman 36 attached. Thanks to PhysDoc's help we have figured out what parts we needed to get the sight to the point that the base will have a blank like you see on some Mausers and Springfields and the lever. The next question we need help wit is: this is the early type with a 10-36tpi stud. Does anyone know what covers the end of the stud when the sight is assembled or is the end of the hollow stud exposed?