BenjaminsBaby: If you're looking for Lincoln varieties in a roll what you do is you take any coins that look like they have extra thickness in the date, mintmark, or lettering and also watch for an extra eyelid of President Lincoln. Set those aside. Now as to RPMs usually an RPM will be like the picture John1 posted. There's enough of a spread between the two that it is obvious. Sometimes though it will initially look like extra thickness. With that extra thickness examined close up you can usually tell if it is an RPM. 37-D is an example of Lincoln where the several of the RPMs look like extra thickness.




















