Pattern pieces almost always exist in relatively low numbers making it easy to compare known examples. This PCGS graded coin from a past Great Collections auction would appear to be the host coin.
https://www.greatcollections.com/Co...e-AU-Details
I thought at first it may be the exact same counterfeit coin, but some of the rim grooves don't seem to match up. This is most noticeable on the reverse rim at K4, where the PCGS coin shows a rim groove while the NGC counterfeit from the article shows a smooth rim at this particular location.
The weak denticles and some of the other pickup points that NGC mentions are present on the PCGS coin though. Maybe someone with more experience on spark erosion counterfeits can add something more.
https://www.greatcollections.com/Co...e-AU-Details
I thought at first it may be the exact same counterfeit coin, but some of the rim grooves don't seem to match up. This is most noticeable on the reverse rim at K4, where the PCGS coin shows a rim groove while the NGC counterfeit from the article shows a smooth rim at this particular location.
The weak denticles and some of the other pickup points that NGC mentions are present on the PCGS coin though. Maybe someone with more experience on spark erosion counterfeits can add something more.

























