A question was recently brought up to me that a certain $2.5 incuse coin had a strange look around the circumference of the coin, almost akin to marks from being crimped at the end of a roll. They were not scratches, but difference in relief, with the edges of the coin being raised on both sides. It was then noted that this occurrence is somewhat common in both $2.5 and $5 Indian series coins. Especially on earlier dates of the 1910s.
I then thought of the way planchets are prepared before being struck, the planchet starts out flat but then gets rolled and the edges become raised. I can understand this technique being done to satisfy the rim and denticles of the Liberty series of gold coinage, but it could be assumed that such a practice would be ceased with the mintage of the incuse Indian series as they have no raised devices other than a mintmark.
From this, I wondered if the answer is that the planchets being used on some of these coins were left over from the previous years of minting the Liberty series. Such an act is not uncommon from the mint as recycling and reuse was common in that time. There definitely could have been a situation where old planchets were found and used without the realization or care of the raised edges.
From this, I am asking the question of if the presence of raised edges on $2.5 and $5 incuse series coins can be seen as something of a planchet error, being that they were struck on planchets intended for the previous series of coins.
Thank You for reading,
Inserted below are images of 2 coins. The coin dated 1908 does not show signs of raised edges on the planchet while the coin dated 1914 does exhibit the described signs.