This Proof 1916 German ½ Mark suffered from improper storage, leaving its surface with an irregular stain. NCS was able to remove the patina, revealing bright, mirrored surfaces. Read this article...
This 1836 example of the popular Gobrecht Dollar has a plugged hole and altered surfaces, but was determined authentic by NCS. Read this article...
Can NCS remove the solder from gold coins that were used for jewelry? Read this article...
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