There are two types of saddle bar sling swivels. One has a flat plate and the other is curved. These are the flat plate type. Most have a circle with a dot in its center which is a simplified rising sun mark. These were used on 1891 carbines and 98-09 Argentine carbines.
These are original used parts in Good condition.
Expect mild to heavy finish wear, scratches and dings, grease and grime.