Mike, your CARETTE disc cutter is a real Jeweler's or Watchmaker's tool.
Its meant to be used professionally cutting out discs out of sheet metal up to 0.5mm thick cleaner than you could do it manually with a pair of sheet metal scissors.
Other with the french LABEUR / EDOBAUD disc cutter (Cisaille) of the 1920... this one was meant as a steam toy only...
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Same story with some kind of Watchmaker's Drill Press like the french RADIGUET... they look and are shurely also have been used often as steam toys recently, but back then they where meant do be used professionally...
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