A group of collectors was deep in conversation when the subject of Contact Marks came up. These were seasoned collectors who were well versed in the jargon of coin collecting and numismatics.

But they could not agree on the definition of Contact Marks. They all agreed it means a slight degree of wear They could not agree on where and how this occurs. One person took the position it was similar to Cabinet Friction where it occurs only when a numismatic item rests on a flat surface and moves around like in a cabinet tray, or loose from its holder, causing the very light abrasion on the high points.

Another person took the position it could come from, say, knocking against other coins, like in a bag of coins. Similar to Bag Marks. Or in pocket change, like from keys or other pocket objects. It could occur at any place on a coin, not just the high points.

Both gentlemen were firm in their beliefs. Could knowledgeable E-Sylum readers chime in? Which meaning is your understanding of Contact Marks?