What Is The Cause Of This Plating Issue On Reverse?

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Author	Replies: 5 / Views: 854
OldJoeClark Pillar of the Community United States 1260 Posts	Posted 02/01/2017 10:58 pm It does not show up well in the photos but the entire perimeter of the building is missing copper plating as well as around some of the devices which you can see in the photos. Thanks. Report this Post to the Staff

Druu Pillar of the Community United States 1000 Posts	Posted 02/01/2017 11:00 pm Thin later of plating that was punched through by the die? I've seen this too, especially on the edges of devices that are raised the most. Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 02/01/2017 11:03 pm The strike force was too strong. When the plating is split the air gets to the zinc and starts to break down. That is why those areas are showing gray. Report this Post to the Staff
OldJoeClark Pillar of the Community United States 1260 Posts	Posted 02/01/2017 11:06 pm Thank you Druu and coop, another lesson learned. Report this Post to the Staff
cwb Pillar of the Community United States 3463 Posts	Posted 02/01/2017 11:08 pm It is commonly referred to as "Split Plate Doubling". It is caused from the Copper layer being stretched as the coin is struck. Sometimes the sharper edges of the die will catch on the thin plating and cause it to tear. It is almost always seen on broadstrikes, as the Copper layer gets stretched much farther on them. EDIT: Broadstrikes on Copper plated Lincoln cents, not the 95% Copper alloy cents. Edited by cwb 02/01/2017 11:10 pm Report this Post to the Staff
OldJoeClark Pillar of the Community United States 1260 Posts	Posted 02/01/2017 11:13 pm Thank you cwb, I appreciate your input. Report this Post to the Staff
	Replies: 5 / Views: 854

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