I just purchased these off eBay. This is my second set all perf 14 and all but one has proper dated CDS (the 3 Ore is obviously unused). There were actually 2 Sc # O5, 6 Ore gray (used key to set). I was able to get the lot for around 2% CV and felt lucky. Evidently not a very popular set, but I like them
JLLebbert thanks for the superimposition of the 568a which allows one to appreciate what's going on. Folks with older Scott catalogs will want to look at another very informative thread about these "new varieties," but the picture here is worth at least a hundred words. http://goscf.com/t/70866
These sort of exchanges are one of the great virtues of this forum.