1985 D Error - Coin Community Forum

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Author	Replies: 6 / Views: 1,246
300 coin guy Valued Member United States 176 Posts	Posted 08/18/2007 9:31 pm Does anyone know what this is on the D on the mint mark. 300 coin guy Image: test.jpg 75.74 KB Report this Post to the Staff

arthrene Pillar of the Community United States 1713 Posts	Posted 08/18/2007 9:41 pm Looks doubled. Report this Post to the Staff
Jorgy Valued Member United States 145 Posts	Posted 08/18/2007 10:21 pm Just looks like corrosion to me. It is not uncommon for contamination to be present on the zinc before the plating is applied, especially in the early years of the zincolns. After the plating is applied the contaminate starts causing the zinc to corrode and creates a bubble under the plating that eventual breaks open. Also around the devices the plating can be damage enough to expose the zinc enough to start reacting with outside contaminates. Around the mintmark is a pretty common place for it to happen. Report this Post to the Staff
errorfinder Valued Member United States 380 Posts	Posted 08/18/2007 11:02 pm Jorgy,first Welcome aboard..I think for a first post yours is absolutely 'on mark '.300 coin guy,agreeing with Jorgy ,myself on this one . with nothing to add,due to the exceptional 1st post by Jorgy. Report this Post to the Staff
arthrene Pillar of the Community United States 1713 Posts	Posted 08/19/2007 12:06 am I don't really know what I'm talking about...I just make assumptions and that's what it looks like to me. Report this Post to the Staff
coppercoins Pillar of the Community United States 7629 Posts	Posted 08/19/2007 12:24 am Actually the cause of these is the plating splitting open during the strike and subsequent corrosion because of the exposure of the pure zinc core to the environment. The reason the coins are more likely to split around the mintmark rather than other areas is because since the mintmark was punched into the die by hand, it is the only place where the angle of the side-wall of the device changes die to die. If the mintmark punch is tilted just slightly when it is punched into the die, it can cause the angle to be too sharp for the very thin layer of copper on the coins struck, thus splitting the copper open. Once that copper is split open, oxygen from the air, water from any source, and sodium from the salt in our sweat cause the zinc to erode and eat away like cancer. Report this Post to the Staff
300 coin guy Valued Member United States 176 Posts	Posted 08/19/2007 7:26 pm Thank you all for looking and giving me your feed back Report this Post to the Staff
	Replies: 6 / Views: 1,246

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