So, Kluson said what one of them was made of, but not the Japanese one? Unless there's part of the quote missing..? Thing is, we've all had duff bridges of every type, and excellent bridges. I can't for the life of me get on with a Floyd, but the Fender System One Trem was excellent. Perhaps the Harmonica bridges I've come across were the good ones - but all I know is this: the ones I have had hands on experience of sounded and looked great.