I have a 1960 ES-330TD that was until yesterday all original. But a couple of the tuners felt like their buttons might eventually break off or crumble. So I replaced them with reissue Klusons before anything happened to the old tuners. I still have the old tuners put up in case I ever have a reason to restore it. Though I doubt I will ever want to sell that ES-330. The only difference between the reissue Klusons I put on is that the new ones have tulip buttons. The old ones have butterbean buttons.