1964-D Repunched Mint Mark / RPM ? - Coin Community Forum

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Author	Replies: 8 / Views: 1,080
JimR Pillar of the Community United States 1490 Posts	Posted 02/11/2007 6:08 pm I have noticed several D mintmarks that appear to be doubled or appear to have a small D on top of a larger underlying D. I have attached a couple pics of one of these dimes, which happens to be a 64-D. What causes the mint mark to look like this? Report this Post to the Staff

coffeecup57 Valued Member United States 146 Posts	Posted 02/11/2007 7:46 pm JimR, This appears to be Mechanical Doubling.Also appears to be on the oak and olive branches and bottom of torch. This is caused when the dies become loose during striking. hope this helps RW Report this Post to the Staff
JimR Pillar of the Community United States 1490 Posts	Posted 02/12/2007 10:29 pm Yeah thats what I thought. I hadn't noticed the branch doubling though. Thanks for the response. Report this Post to the Staff
Metalman Pillar of the Community United States 7123 Posts	Posted 02/13/2007 02:22 am The doubling I see is Die Deterioration Doubling. Metalman Report this Post to the Staff
coppercoins Pillar of the Community United States 7629 Posts	Posted 02/13/2007 02:29 am I don't see doubling on anything other than the mintmark, and it's not deterioration doubling. It's simple Machine Doubling. Somewhat common for it to only occur on the mintmark because this is the only part of the design that's placed into the die by hand, and the angles sometimes make the coin and die stick together there only. It's an eject doubling thing. Report this Post to the Staff
Metalman Pillar of the Community United States 7123 Posts	Posted 02/13/2007 02:54 am Jim take a look at the examples of doubling on this site,, I can see the doubling surrounding some of the devices,, as well as the mint mark . http://koinpro.tripod.com/Articles/...Doubling.htm Metalman Report this Post to the Staff
JimR Pillar of the Community United States 1490 Posts	Posted 02/13/2007 09:32 am Thanks guys for the input. The link to Koinpro is very informative. Report this Post to the Staff
just carl Bedrock of the Community United States 20753 Posts	Posted 02/15/2007 5:23 pm I too like that koinpro web site. I printed it out. Looks like it gives coppercoins web site some compitition. Extensive examples. Report this Post to the Staff
garylcsr Pillar of the Community United States 1952 Posts	Posted 02/17/2007 01:15 am it's going to take more than a few photos to give coppercoins any competition although Ken's site is also a good source of information Gary Report this Post to the Staff
	Replies: 8 / Views: 1,080

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1964-D RPM?