1970 S Proof Set Help - Coin Community Forum

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Author	Replies: 5 / Views: 724
cmaracing New Member United States 19 Posts	Posted 06/10/2022 12:02 pm So need opinion on 1970 Proof coins, I have always had problems determining DDO and MD. Ironically the Quarter and Penny look to have DDO or MD also. Jefferson nickle. Dime Thank you All. Sorry still learning to adjust the picture sizes. Report this Post to the Staff

coop Bedrock of the Community United States 62064 Posts	Posted 06/10/2022 12:14 pm Machine doubling. Your looking at the outside edges of the devices. On a Doubled Die, the spread on them are on the centers of the devices, making them look wider.. Machine Doubling and die wear is what you will find on the outside edges of devices. You are seeing where the contour of the device was flattened by the machine. The spread enlarges the devices: On Machine Doubling the edge is looking like a 90 degree corner on the affected area. Note on the example above the lack of that look. You see the spread lines on the top of devices, not on the edges. Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 06/10/2022 12:35 pm The coopmeister calls it. to the CCF! Report this Post to the Staff
cmaracing New Member United States 19 Posts	Posted 06/10/2022 12:56 pm Thank you, DDO and MD have always been difficult on my part to make a determination. Report this Post to the Staff
Dearborn Moderator United States 97904 Posts	Posted 06/10/2022 5:00 pm DDO and MD is very hard for a lot of folks to see the difference. One way to look at the thickness of the devices - if they are thinner - then it is MD. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 06/10/2022 5:53 pm Also the affected edge of the devices are 90 degree angles. The contour of the devices that were there, are no longer there, because the devices were damaged. You can have Machine Doubling on a doubled die, but Machine Doubling never makes a doubled die. The doubled die, is what makes a doubled die coin. Edited by coop 06/10/2022 5:54 pm Report this Post to the Staff
	Replies: 5 / Views: 724

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