No, not all rings are stamped. Most eternity bands and rings that have diamonds that go all the way around the band are not stamped because the holes for the diamonds are in the way.
As the Common Metal Marks Stamped Inside Rings, TI=Titanium
[object Object]
john c rinker
caliber and maker's name
That is the company or maker.
often the model and maker are stamped on the weapon
they are gold plated.
Peter Jackson directed lord of the rings.
Sometimes the manufacturuer is stamped on the bottom of the board.
the number stamped onto the rifle that allows it to be identified, usually done by the maker.
thir are hundred of maker marks on rings, though the 14k is for 48% gold.