Philippe Dufour stands high up in the watchmaking pantheon, not as a brand, but an independent master watchmaker--just himself, an assistant or two, and a few machine and hand tools that would be instantly recognizable to a watchmaker 200 years ago.

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Nano bar codes are the molecular versions of traditional bar codes--metal nano-particles that have specific, recognizable chemical fingerprints that can be read by a machine, perhaps a UV lamp or optical microscope.

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