[Ted @ LA Guitar Sales]

Originally Posted by Doubleneck

Think you would have to include the WS1000N1

Originally Posted by SpruceTop

+1, being that a large number of RainSong WS1000N1 guitars were sold prior to the introduction of the N2 neck...

And D-28's were built without and adjustable truss until 1986. But since "D-28" covers all versions built since the 30's, I'll amend my answer and say WS-1000 to include all versions of the Rainsong WS.