I was hoping for a book on these would probably would be volumes 1-3. But My time is running out, and he is also close to my age as well. So this maybe hard to happen.
Not until they are listed. Just something to hope they will get ID' in the future. Basically the same number of RPMs per die are the same amount. The desire to own the stronger ones are what makes them worth more money. My most expensive RPM is 1960D-1MM-004 as there are few of these known or for sale. http://www.coppercoins.com/lincoln/...ie_state=eds Probably the most desired RPM of 1960 is 1960D-1MM-011. Every one I know of is missing that one. http://www.coppercoins.com/lincoln/...ie_state=mds
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