Roll Searching - 1974 Kennedy Half Rim Error?

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Author	Replies: 7 / Views: 1,461
Isos Valued Member United States 62 Posts	Posted 08/02/2013 10:14 pm Found this one in a bank roll with a 1981-S proof and a silver 1968-D. Someone must have dumped a coin collection I'm pretty unfamiliar with error coins. Can anyone enlighten my about this possible error at the rim? Report this Post to the Staff

Conder101 Bedrock of the Community United States 17884 Posts	Posted 08/03/2013 10:29 am Looks like it has some slight finning. Report this Post to the Staff
albertharris Pillar of the Community United States 901 Posts	Posted 08/03/2013 11:19 am Railroad rim? Nothing very rare Report this Post to the Staff
Isos Valued Member United States 62 Posts	Posted 08/03/2013 1:30 pm It's a little more dramatic in 3D, but still a more subtle thing. Thanks for taking a look. Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 08/03/2013 2:56 pm What does the reverse look like? At 3:00 the rim looks strange there. Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21788 Posts	Posted 08/03/2013 11:09 pm If, as normally happens, the die strikes the planchet dead center, no high rim will result. The die has to be slightly smaller than the collar, so that the edge milling can be struck up. That means there must be a visible, but tiny, amount of free play between the collar and the die. If either are very slightly off center, a high rim of this type can result. High rims of this type are reasonably common. Happens at all Mints around the World. Report this Post to the Staff
publius Pillar of the Community United States 807 Posts	Posted 08/03/2013 11:42 pm By my direct measurement, from a die in my possession, the typical clearance between die & collar is (for a collar without reeding) 0.1 millimeter. Hence the die is 0.2 mm smaller than the finished coin. Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21788 Posts	Posted 08/04/2013 12:14 am That would be enough to allow a tiny fin on an otherwise perfectly struck coin, where die and planchet are off center, by a tiny amount. Report this Post to the Staff
	Replies: 7 / Views: 1,461

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