I posted a little while back about a decent Morgan that was sent off to be graded and came back MS, Questionable Color. I bought the coin raw and thought it was attractive, so I had it graded. I need some "edumacation". I briefly dipped the coin and removed most of the toning. What I don't know is this: It left striation lines that were not visible prior to dipping. I just briefly dipped it again. The striation lines are still there even without any hint of toning. They cover both the fields and devices, perfectly uniform, across the entire coin. They are not some random hairline marks. I don't believe they are die polish lines because they also cross the devices of the coin. I tried to research if the lines are pre or post mint damage. I'm still not sure, but I found the following. Roller Marks: Caused when the original silver ingot was rolled thin before blanks were punched out. They are “straight and parallel, long, [and] affect the entire sheet of metal.” Help please? Photo of coin before second dip below.
This may be of help. They started this in 2011. I haven't heard anything about it since then. https://www.pcgs.com/News/PCGS-Coin-Sniffertrade-Uses-Advanced-Technology-To-Detect-Doctored-Coins
Interesting, the striations and the QC designation have nothing in common. I have never seen in hand a Morgan that had heavily striated surfaces. Now I am gonna have to search for one. Edit I have seen roller marks on a Morgan. Most of the coins I have seen are like this one. The majority of them are usually struck out. https://www.cointalk.com/threads/1883-o-o-morgan-are-these-roller-marks.399041/
I found the roller mark quote from AI. I generally try to stay away from coins with those, particularly raw ones, it just looks sketchy, like in whizzed. Before today I just thought it was due to die polishing when it's just in the fields. But it extends across Liberty's face as well. The reverse has so many objects, it's not noticable. Seems like every day I find out how much more I don't know.
