Pieces of pure craft. Divine and sacred beauty. These Masters have a lot to teach us. As to some commentators, please stop the silly myth about nails. These are sometimes necessary ; they've been used for thousands of years. Sometimes there is no other way. In some cases even the rusting is taken into account, because it creates a "seal". The story of craft is endless ; it has been going on for millennia all over the world. You have to lift up your eyes higher than your belly buttons.
