RPM's?

I'm new to coin collecting which I'm sure you can tell from this post. Anyhow, I have a roll of BU 64d washies I picked up not long ago from a member here. I was trying to find type B or C from a post I saw here, No luck. Seems almost the full roll has some type of doubling on the MM. Here are photos. Are these RPM? If so are they worth anything over melt? What is the point of RPM's? Why or how were they made? These are the best pics I could come up with, I only shot 3 diff coins. Thanks for any help.
Oh yeah, The coin on the end was really toned. Do all toned coins bring a premium or just the pretty ones? Pic included
. Sorry for the pics, I only have a $60 cam and I'm not very good with it.




Oh yeah, The coin on the end was really toned. Do all toned coins bring a premium or just the pretty ones? Pic included






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All three are machine doubling. The same doubling is visible in the denomination "Quarter Dollar" - since mintmarks and the rest of the design are placed into the die during completely separate processes, any doubling on one will be completely unrelated to any doubling anywhere else. So, if both are doubled the same - it definitely happened during the strike, which is machine doubling. It's very common and has no value.
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Maybe RPM 2 or 6. I don't follow the series, so I'm not sure.
David
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