NCS June 2017 Highlights

Numismatic Conservation Services (NCS) uses a variety of proprietary techniques to remove harmful surface contaminants, stabilize and protect a coin's surfaces and, in many cases, improve a coin's eye appeal. After coins are conserved by NCS, they are seamlessly transferred to Numismatic Guaranty Corporation (NGC), an independent affiliate of NCS, for grading and encapsulation.

Below are a few highlights of coins that were conserved by NCS and graded by NGC last month.

This 1862 Netherlands 10 Cent was submitted to NCS with a severe case of PVC residue. Stark jade green spots are a sign of advanced PVC residue development and can be seen all over the surface of this small silver coin. When PVC residue development is as severe as what appears on this coin, any damage the residue has begun to do by corroding surface metal is a concern. This coin luckily survived with little permanent damage due to the PVC residue.

1862 Netherlands 10 Cent Before conservation Click images to enlarge.

1862 Netherlands 10 Cent After conservation Click images to enlarge.

This Chinese Silver Dollar dated the 23rd year of the Republic, equivalent to 1934, was in dire need of conservation. Long-term storage in a lower-quality coin holder containing PVC had created a thick jade green residue covering nearly the entire surface. In many cases PVC residue that has developed to this advanced state frequently has damage to the surface metal. Incredibly, through careful conservation efforts, the PVC residue was able to safely be removed while revealing little damage to the original surface.

China Silver Dollar Year 23 Before conservation Click images to enlarge.

China Silver Dollar Year 23 After conservation Click images to enlarge.

This 1938 Walking Liberty Half Dollar came to NCS in need of help after many years in poor storage. Coin holders with PVC allowed an early form of PVC residue to form fairly uniformly over the surface of this important coin. Rather than the thick jade green spots of an advanced PVC residue, this coin sported a pale green haze over the entire surface. Careful removal of the PVC residue was able to reveal a beautiful coin that could grade numerically with NGC.

1938 Walking Liberty Half Dollar Before conservation Click images to enlarge.

1938 Walking Liberty Half Dollar After conservation Click images to enlarge.

For more information about NCS, visit www.NGCcoin.com/NCS.