The 806D2 was introduced in 2002. and maybe a 805 was changed from the 800 to the 805 when the axis lock was added.
from the 2002 catalog
For all you Benchmade aficionados out there who have become huge AFCK fans over the years (and for you soon to be converts) - the AFCK (and TSEK) has just gotten better. We have now integrated the unsurpassed AXIS locking mechanism with its many positive attributes into the AFCK's original chassis. Now you get the same time honored, proven performance of the AFCK design, supercharged with the added superiority of AXIS.
The 800 was not included in the 2002 catalog