Doing a little searching I found it mentioned in Louis Ginzburg's THE LEGENDS OF THE JEWS (free online at link).
Have you studied it and, if so, what do you think of it?
I wonder what Orthodox Jews think of it?
I don’t have an opinion yet because I am only beginning to study about the Sword of Methuselah. There is so much to learn, I believe the sword exists. I wonder if it is kept in the Cave of Treasures.