What year did the mint start putting mintmarks on galvano? 1990 D/D Washington?? PIX ADDED

Comments

• mozeppa Posts: 4,431 ✭✭✭

  March 20, 2010 3:22AM

  1990 was it.

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• RWB Posts: 8,082 ✭

  March 20, 2010 3:34AM

  It's part of the master die, not a galvano. For modern commemoratives, it's usually part of the final design model - no galvano is made.

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• Coinosaurus Posts: 9,645 ✭✭✭✭✭

  March 20, 2010 4:23AM

  RWB-
  
  What's the latest technology - do they cut master dies with lasers drvien by a 3-D computer rendering of the artist's model?
  
  From there, are the working hubs/working dies still produced using electolysis to transfer the image?

  Newman Numismatic Portal, www.NewmanPortal.org

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• RWB Posts: 8,082 ✭

  March 20, 2010 6:20AM

  Transitioning to machine or laser cut master die.
  
  The model is scanned and digitally reduced. Cutting instructions go to a cutting tool which makes the master die. Master hubs are made on an hydraulic press and working dies then made from the master.
  
  Eventually, a CO2 laser will cut the master die, but that’s still being tested.
  
  BTW – the mint folks recognize laser “frosting” looks like snakeskin and are working on improvements.
  

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• bushmaster8 Posts: 5,616 ✭

  March 23, 2010 12:00AM

  ??

  "Wars are really ugly! They're dirty
  and they're cold.
  I don't want nobody to shoot me in the foxhole."
  Mary
  
  
  
  
  
  
  Best Franklin Website

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