I found a large group of these great rare cards and they are listed up on my site for sale and priced with images now.
The 1909 cards can be found at:
https://www.gfg.com/baseball/obak1909t212.shtml
and the 1910 150 backs can be found here:
https://www.gfg.com/baseball/obak1910150.shtml
Coy with the Very Rare "Just Right" Back
I also have 175 subject back and 1911s and you can find the links to those there on the site!
We listed cards in 1909 with psa grades of "1" through "3" I have quite a few with higher grades, up to "6.5" If you are interested in any of these, you can contact me directly. All the 1910 & 1911 cards are listed.
Thanks for looking
Dave