Need Help With 1976 25 Cent - Coin Community Forum

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Author	Replies: 6 / Views: 1,425
oldmike Pillar of the Community Canada 891 Posts	Posted 12/20/2016 9:19 pm This coin has a raised area around the bust and am wondering what causes that Report this Post to the Staff

M_d_in_guy Pillar of the Community Canada 1049 Posts	Posted 12/22/2016 12:59 am Is it convex toward the obverse and it starts on the field side of the devices, if so I've seen similar with other coins. I always figured PMD in cases like this. I don't believe any part of the minting process can dish a coin? Report this Post to the Staff
TerryT Pillar of the Community Canada 822 Posts	Posted 12/22/2016 01:25 am Usually unequal die pressure, like many large cents, 1900, 1901 and many Ed VII. Report this Post to the Staff
oldmike Pillar of the Community Canada 891 Posts	Posted 12/22/2016 01:42 am Thank you It appears to me that both sides are the same only much lighter around the caribou Report this Post to the Staff
Scissel Pillar of the Community Canada 693 Posts	Posted 12/22/2016 2:18 pm I thought it was from over-polished dies. Die subsidence would be another possibly possible option, though that effect is usually associated with die cracking. TerryT : Can you expand on your answer? I'm curious about what you mean. Report this Post to the Staff
TerryT Pillar of the Community Canada 822 Posts	Posted 12/30/2016 9:12 pm Too little or too much pressure. Whoever set up the press had something a little bit off; die a fraction of a millimeter too thick, not locked down tight enough, thick or thin planchet, slight difference in the metal ? The settings for one set of dies may need to be slightly different from another - they do test runs when they are changed and this one didn't get set perfectly. Report this Post to the Staff
oldmike Pillar of the Community Canada 891 Posts	Posted 12/30/2016 11:53 pm "Interesting" Thanks TerryT Report this Post to the Staff
	Replies: 6 / Views: 1,425

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