20 honor from a rank 10 gank. Video was posted on July 7th, 2007:
This is months before season 3 when you said:
Here’s a post saying honor at 70 is 20.9:
It is important to note the following: one kill= 20.9 honor at level 70.
Rank 9 kill, 21 honor (rounding happens when honor is 20.9):
Released on November 13th, 2007. This video is July 7th, 2007.