The plates either exist or they don't.
There were 15 men + who handled them.
Oliver Cowdery
Some time after leaving the Church, Oliver Cowdery, who had studied law, became prosecuting attorney in one of the counties of the state of Michigan. During the course of a murder trial the attorney for the defendant challenged Oliver Cowdery in the following words:
"May it please the court, and gentlemen of the jury, I challenge Mr. Cowdery, since he seems to know so much about the poor defendant, to tell us something about his connection with Joe Smith, and the digging out of the hill of the Mormon Bible, and how Mr. Cowdery helped Joe Smith to defraud the American people out of a whole lot of money selling the Mormon Bible and telling them that an angel appeared to them from heaven, dressed in white clothes."
When it came Oliver Cowdery's turn to reply he arose in calm dignity and in a clear voice said:
"If your honor please, and gentlemen of the jury, the attorney on the opposite side has challenged me to state my connection with Joseph Smith and the Book of Mormon: and as I cannot now avoid the responsibility, I must admit to you that I am the very Oliver Cowdery whose name is attached to the testimony, with others, as to the appearance of the Angel Moroni; and let me tell you that it is not because of my good deeds that I am here, away from the body of the Mormon Church, but because I have broken the covenants I once made, and I was cut off from the Church, but, gentlemen of the jury, I have never denied my testimony, which is attached to the Book of Mormon, and I declare to you here that these eyes saw the angel, and these ears of mine heard the voice of the angel, and he told us his name was Moroni; that the book was true, and contained the fulness of the gospel, and we were also told that if we ever denied what we had heard and seen that there would be no forgiveness for us, neither in this world nor in the world to come." (
The Restored Church, 7th ed., p.74-75)