#seal__stamp  a device incised to make an impression; used to secure a closing or to authenticate documents
  supertype:  #device.design  any ornamental pattern or design (as in embroidery)
  subtype:  #bulla  the round leaden seal affixed to a papal bull
  subtype:  #cachet  a seal on a letter
  subtype:  #great_seal__greatseal  the principal seal of a government, symbolizing authority or sovereignty
  subtype:  #handstamp__rubber_stamp  a stamp (usually made of rubber) for imprinting a mark or design by hand
  subtype:  #signet  a seal (especially one used to mark documents officially)

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