It isn't possible for an RPM to occur after 1989 in quarters. Also, RPM's are not worth much, and I honestly don't check most of my coins for them. If you want one, then buy one or search through boxes of coins. I have found a couple, but again, I don't search that hard.
I don't understand what you are saying to me. It's an obvious repunched mint mark. Whats your source for saying rpm cannot happen after 1989 in quarter
After 1989 RPM's were not possible because the mint stopped punching the mintmarks by hand. The only way for there to be an RPM is if a coin was punched twice. And since they are no longer punched by hand, this doesn't happen anymore. To me, it looks like you are seeing a die crack or a plating issue. Not an RPM.
The mint makes a master hub for each coin. They use the master hub to make master dies. Master dies are used to make working hubs. Working hubs are used to make working dies and the working dies strike coins. If I recall correctly, a working die for a quarter has a life of 275,000 strikes, so the mints would use hundreds of dies during the year Until 1989, the mint would stamp the mm into each working die individually. Starting in 1989 the mint added the mm upstream in the process (I believe it was to the Master die, but don't quote me). That means that numerous working dies will come from this master die and have the exact same location and appearance. https://www.usmint.gov/learn/production-process/die-making https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/
