Now you beat me Wayne,
I would never dream of relating such elementary (abrasive) circular turning with the intrincate swirls of guilloché.
Back in the nineties i have asked a coleague to get me a piece of stainless steel sheet for some home application and the thing came with those finish effects. Hence my idea of modernity; nothing to do with Monsieur Guillot's invention.
Yet i may be wrong
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