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In intaglio (line engraving), the image is hand-engraved as lines on a die and is transferred to a plate. Figure 2 shows the 1¢ New Netherland stamp in the Huguenot-Walloon Tercentenary issue, Scott 614.
that is, they can become worse as the transfer roll continues in use. Progressive relief breaks can result in stamps that show the progressive deterioration of the transfer roll. A classic example of this is found on the 5¢ Huguenot-Walloon of ...
 See also: Roll, Gauge, Engraving, Engraved, Piece
  
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