Fine metalworking: tiny knives and batlike brooches from Mario Cesari

I ran into Mario Cesari at a market in Florence, Italy today (I'm in town to speak at the Museums and the Web conference). He's a metalworker who produces beautiful pieces that are really to my taste (I bought a weird, bat-like brooch from him). There was a lot more I was tempted by, especially the little, finger-length machete pen-knives. He's got an Etsy storefront with a good selection of his work. Having handled it and bought some of it, I can affirm that the workmanship and aesthetics of these things are beyond reproach.