Has there really been much research conducted on this subject? I know there are theories but has identical Longacre doubling been attributed to two different working dies? If Longacre doubling is unique from working die to working die – then why is it looked at differently than other collectable varieties possessing a re-punched device?
One theory of how Longacre Doubling was created is the punches with the design elements (stars, letters, numerals, etc.) were the same shape and slightly larger than the design element which created a "ghost" around the design element when it was punched into the Master Die. So every Working Die created from these Master Dies would have the same Longacre Doubling. Frank Zapushek explains Longacre Doubling rather well here.
QUOTE "Not all dies produced the “Longacre Doubling”. On those that did produces (sic) the doubling, it will slowly disappeared (sic) as the die strikes more coins. Or if the die is polished for any reason. So, if a coin as (sic) the full doubling like this coin, it must be a very early die stage." This doesn't make sense to me. Die gouges, Re-punched devices, polishing marks and etc. which aren't set nearly as deep into the surface of the die as Longacre Doubling survives multiple die states.
