Yes, I misspoke ... mistyped. Actually, the cat I hold has the C Series (i.e. the Dragon and Thunder wraps) with rails. Even the YD Series in that cat has a rail. I stated that in reverse. My bad.
What I was trying to state was that this was a small window in the evolution enroute the 'thousand' series drums. The Willow and Dragon and Pine and Ripple and Thunder wraps were all from the same period. The very cool 200 Series colors (red, blue, gold, silver) were only available for a short time on the lower end kits ... and yet they are loved by those who are lucky enough to have clean examples. I believe these represent the last of the 'groovy' wraps produced by Yamaha before the 'thousand' series kicked in and all finishes went plain and tame.