VDB Issue - Coin Community Forum

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Author	Replies: 7 / Views: 1,305
chzman Pillar of the Community United States 1137 Posts	Posted 05/20/2012 11:12 pm Just curious as to what causes this issue, I do not think that it is rare or anything. Any info would be appreciated. Edited by chzman 05/21/2012 12:19 am Report this Post to the Staff

chris86 Valued Member Canada 185 Posts	Posted 05/20/2012 11:23 pm looks to me like the vdb initials were double-struck Report this Post to the Staff
chzman Pillar of the Community United States 1137 Posts	Posted 05/20/2012 11:58 pm It looks like it struck then slid into place and made a grove where that part of the die first made contact with the planchet. That is my theory but yours sounds better. I will upload another pic. Report this Post to the Staff
coppercoins Pillar of the Community United States 7629 Posts	Posted 05/21/2012 12:37 am This is actually the effect of excessive die wear. The die simply starts to chip away toward the rim as molecules of steel dislodge from the surface and pancake outward. Report this Post to the Staff
chzman Pillar of the Community United States 1137 Posts	Posted 05/21/2012 12:44 am Report this Post to the Staff
chzman Pillar of the Community United States 1137 Posts	Posted 05/21/2012 12:52 am thank you, die wear it is. Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21789 Posts	Posted 05/21/2012 08:43 am I think that this a classic case of 'metal flow'. (I don't know the correct term for this, so I just had to 'coin' an expression to give a name to it.) Most of the design on the coin is in relief, but the VDB is incuse. That means the 'VDB' on the die is in relief, and as such, acted as a barrier to the flow of metal as the coin was struck, which gives rise to a 'shadow' on the outside edge of the letters, as the metal flows out radially, under great pressure. What is more curious to me is the fact that this 'shadow' effect shows up more strongly on some coins than others. Must have someting to do with the annealing of the planchet or the striking pressure, or both. Report this Post to the Staff
chzman Pillar of the Community United States 1137 Posts	Posted 05/21/2012 08:46 am very interesting, thank you sel_691 for that explanation. Report this Post to the Staff
	Replies: 7 / Views: 1,305

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