Conservation Showcase: 1940 Walking Liberty Half Dollar Proof

Posted on 3/7/2014

This beautiful coin was hidden beneath thick yellowish residues.

NCS Conservation Showcase NCS Conservation Showcase
click to enlarge click to enlarge
NCS Conservation Showcase NCS Conservation Showcase

Improper storage can lead to the development of many kinds of residue that, besides being unattractive, could lead to corrosion. Corrosion of the surface of a coin can lead to what is commonly known as environmental damage.

This proof 1940 Walking Liberty Half Dollar was recently submitted to NCS for removal of the thick yellowish residues that were obscuring the mirrored surfaces of the original coin and creating the potential for permanent damage. Original surfaces were peaking through the residue on this coin in several small tantalizing spots. Conservation work was able to remove the yellow residue from the surface of this coin revealing surfaces that have been affected very little by the damaging aspects of such residue.

Return to the Articles List

  • Global Locations
  • Germany
  • Switzerland
  • Singapore
  • China
  • Hong Kong
  • Taiwan
  • South Korea
  • Global locations map
  • Contact Us
  • NCS
    P.O. Box 4750
    Sarasota, FL 34230
  • 1-866-NCS-COIN toll free
    +1 941-360-3996
    +1 941-360-2559 fax
  • Hong Kong
    Tsim Sha Tsui, Kowloon
    Hong Kong
    +852 2115-3639
  • Switzerland
    Zurich, CHE
    +41 43 816 28 16
  • Germany
    Munich, Germany
    +49 89 255 47 545
  • Numismatic Guaranty Corporation
  • Paper Money Guaranty
  • Comics Guaranty, LLC
  • CCS Paper
  • Collectors' Society
  • Certified Collectibles Group
  • Official Conservation Service of


    © 2016 Numismatic Conservation Services, LLC | Legal | Privacy Policy | Terms, Conditions and Descriptions | 866-NCS-COIN