Thank you Bill Weiss for your very informative comments. First, I was wrong when I said my S-27,S-28, and S-29 were certified. I believe they are correctly attributed but could be mistaken. Much of my collection was developed 30 years ago before I was smart enough to buy only certified stamps. I may be sending these to you soon!
Secondly, I demonstrated to myself that the Seigel pictures are NOT color correct.
I have taken a picture of my S-27, S-28, and S-29 using careful color correct lighting and a camera. I have quite a bit of experience taking color correct pictures as I breed flowers in my spare time. One can clearly see the color variations on my own stamps. The forum only allows very small 100KB pictures, so I'm hoping I can provide a link here:
http://www.daylilygarden.net/S-27-2...rcompare.jpg (if this link does not work, I'll post a small picture here)
Here is also a link to my S-30 and S-30A where one can see entirely new colors.
http://www.daylilygarden.net/S-30-30A-compare.jpgThank you Bill Weiss for being here to share your extensive stamp knowledge.