The following appears to be an obverse die trial of the 1910 Lincoln cent. It is struck on an oversized irregular copper planchet that is heavier than a standard cent planchet and was graded as by PCGS as a die trial .
It should be called JA1910-1/P3528 now that it is agreed to be a die trial.
Mike Diamond did an article for Coin World published on July 14, 2014, and titled "Scrutinize claims of experimental planchets, test strikes; they may be error coins instead" noted: Our last example, a 1910 Lincoln cent, is currently encapsulated and labeled as a uniface test strike. It is classified as JA1910-1/P3528 by uspatterns.com, although with some caveats. I think the caveats are warranted and should be elevated to serious doubt. The coin’s weight has never been reported and may be the same as a cent (its color is certainly the same). While the planchet has been described as “slightly larger than normal,” I don’t see any basis for this conclusion. The coin was struck out-of-collar and the portion of the coin lying beyond the die-struck obverse design shows obvious radial striations all around. This would indicate that the planchet was originally no wider than the die face and that the unstruck perimeter squeezed out from beneath the die during the strike.
The available evidence indicates that this is probably a uniface broadstrike. In other words, a cent planchet was struck on top of another cent planchet while neither was confined by the collar."
Based on the weight and overall fabric of this piece, it is no longer believed to be the case and we are now assigning it as a die trial.
Photo courtesy of Mike Byers.