Dean, what ever it is will be more than I have. But I would think from $450 to $550 or more; seller doesn't state whats under the Case stamp XX or USA. Sure is in nice condition though.
It is from the late XX era. Knife looks to have been carried a some as well. Look closely the the bottom center pins on both sides, both look like the may very well be cracked. Could be the picture but I'd sure like to know before buying. Spectacular handles otherwise!
And cracks are beginning to appear in the "like new" condition of this knife, his revised ad states (after being contacted by folks.) He does offer a 7 day return which is admirable.