Quoting from Kevin AKA Mad Dog McClung:
This is the rarest of the military SEAL ATAKs.
There were only ten of these made. They were produced on the cusp of the design and marking changes mandated by the US Navy in 1993.
So, no more of this pattern were ever made.
Five (consecutively numbered) of these were used in the movie "Under Siege II" and disappeared into Seagal's footlocker, and the rest went to NAVSPECWAR for demos... except this one, the last one, #B10.
I kept it, forgot about it, and found it while cleaning out the safe last week.
The last one of these B series blades that sold went for $10,000.00 at a Safari Club International benefit auction several years ago. Stephen Seagal donated one of his for the fundraiser.
The blade is a hand ground SEAL ATAK blade with hand cut file work, false edge, bright hard chrome and it is the first serrated ATAK pattern. Hand ground composite grip.
Kevin sold B10 for $8,000 in February of 2006.
Here is the quote link.