Posted By:
DaveI think I got most of my info from the T206 site in the previous post, but here's a quick answer.
The Sweet Corporal factory 42 is somewhat rare. We just had a thread on that topic.
All the factory 25 Piedmonts are the most common back, including all the series 150 and 350 Piedmonts. Only series 460 had factory 42.
The cycle is probably the rarest of your list.
edited for spelling