What is the bracelet in boys from Brazil?

A suggestion might be that it shows a contradiction in Mengele's Aryan thinking in that he used native, primitive, "inferior" women as the womb for the little Hitler boys. When Mengele picks up the bracelet off of the floor of his third-world thatched roof clinic in the jungle, he somehow does not see the flaw in his perverted Aryan thinking, and takes the bracelet with him, I suppose, as a memento. I can find no other answer on the Internet, unless it's found in a synopsis or review of the book.