Quote:
1st - The "teeth" that run along the outside perimeter. (Yeah, I know they probably have a technical name, but I haven't learned that yet). The top coins parameter "teeth" are slightly larger than the two bottom coins. So I counted them. The top has only 177 teeth, the two bottom coins both have 183.
2nd - The wing on the left side: The top coin is the only coin where the wing touches the 2nd arrow. The mid and bottom coin aren't touching the 2nd arrow.
3rd - The feather on the right side, closest to the leafs; The top coin is the only one where the feather stops short. The other two coins show this feather going all the way to the leaves.
4th - The birds hand on the right side of the coin: On the mid and bottom he clearly has two twigs. On the top, there is clearly only one.
5th - The stem of the branch in the birds hand (Right side of the coin): The top coin, the branch is clearly below the arrows. The mid and bottom coin the branch is above the arrows.
The
Trade dollar had a design change in 1875 that is called type 2 for both the obverse and reverse. A mixture of type 1 and type 2 can be found on the years 1875 and 1876. Pre 1875 is all type 1 and 1877 and after is all type 2. The differences you note are the difference between type 1 and type 2. The top coin is a 1875 S with a type 2 reverse. The bottom coin is 1875 CC type 1 reverse. The counterfeit has a mixture of type 1 and type 2 on the reverse that never happened at the mint.
The two twigs you note is a stem and a berry in the eagle's claw that was omitted in the type 2 design.
The teeth are called denticles. I was not aware that the number of denticles changed between type 1 and type 2, but I am sure that is why there is a difference.