Another Question From Koo. $30 Documentary Unlisted ?

I came across this.
I could not find a record of it in the specialized catalog.
Its a 30 dollar documentary stamp without numbers or overprint.
In the catalog this series goes up to ten dollars then jumps to $30 but the $30 variety is with Grant and not the liberty. Could someone help me out please and if you find the reference please tell me where you found it so I can learn how to use the catalog better.
Specialized catalog, 2006
Page 511 Pic in catalog R21
Thankyou

Also in the Scotts catalog they use the terms Cut cancel and Perf initial. Could someone please show me an example.

From Scott 2013 Specialized, page 654
R222 $30 vermillion
R21 - Liberty
Catalog value $21.00
Cut Cancel $2.25


don

edit
Here is an example of a cut cancel
http://www.ebay.com/itm/US-REVENUE-...em2ecb7bb13d

Great thank you so much. Was it only added in 2013. Or did I just miss it in my catalog.