Here is what sifu Dickson Niew posted,
HOW TO DETECT FAKE PILLAR DOLLAR:
- Outwardly this coin looks like a real pillar dollar. Probably it made from alloyed of metals, which contained silver. It rings like silver. Its details are not sharp, the surface is full of tiny sand holes,porous.
- It suppose to have a delicate yellow patina, which usually is generated on low-silver alloys, but became silvery bright after cleaned.
- I have recognized it is a fake Pillar Dollar, when I felt its weight, it was significantly lighter (19.01gm). Next, I saw that its edge differs from common reales floral edges. Its edge was like the edge of Malaysia milled edge coins. You can see on the picture that the rim of the coin is higher than the surface/fields. That suggests that the edge was made later then/after the surface was minted.
Here is one example of their expert view, Dmitry Livshits.
HOW TO CHECK GENUINE PILLAR DOLLAR: