I have been studying plating dynamics for copper-plated zinc cents. I summarized some of my findings in a paper titled PLATING SURFACE...
I have been researching plating issues on Copper Plated Zinc Cents. The information I have found has been both interesting and challenging. My...
This looks like a DDO to me? Split serifs on the 4s with wide right crossbars.[ATTACH] [ATTACH] [ATTACH] [ATTACH]
Just sharing. 1960-D SD RPM Looks like an unlisted RPM. Very difficult to see, much less photograph! Has plenty of significant markers! This...
Just thought that I would share. Mad Die Clash site appears to identify attributions with a numbering system which assigns a number to a clash...
James Wiles states: "1991 – The U.S. Mint began punching the mintmark into the master die for the dime, quarter, and half dollar denominations....
1920-D LWC TRIPLE ERROR · Improper Alloy Mix (Woody) · Cracked Planchet · Tri lateral Lamination (OBV, REV & Edge)[ATTACH] [ATTACH] [ATTACH]...
Just sharing. I have a small collection of Large Cents by die states. This die state with only one cud is listed as RARE. Later die states are...
Previously unrecognized (by Numista and NGC) Small Date Variety found. This 5 Centavos Peru type series runs from 1945 to 1965 Numista and NGC...
During this time period, the Obverse was commonly the hammer die. However this statement: "Most off-center strikes and some uncentered...
The last digit is rotated in a counterclockwise direction and shifted northward. Online images of other 1964 5-centavo coins show the last digit...
I was advised to continue photos in a separate post since the first shut off at 10 photos. While there are a few more photos, I will leave it...
1959 Un Peso Class II DDR: Rotated 40° CCW; Approximately 350° circumferential die crack. Many of the letters in Estados Unidos Mexicanos, on...
I need someone to check my attribution on this 2007-P Dime. I am thinking Inverted Dies Reversed Partial Collar? Compare to the dime here:...
Previously, I had reported that this Quarter appeared to be a Doctored Coin. It turns out that it is not doctored, but is, in fact, an Error – and...
Check out my paper in Errorscope “Why are Copper Plated Zinc Cents Resistant to Lamination?” It is now online at the CONECA website...
I am thinking this may be an Uncentered Broadstrike with Partial Collar. Weight = 3.15g Thickness = 1.34mm Horizontal diameter = 20.35mm...
The striations from the split side of the planchet can be seen across the bust. Weight 1.89g. Average thickness 0.89mm. [ATTACH] [ATTACH]...
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