Well, I found an 87 with that exact same stamp (except for the dots, of course) and I've never seen a stamp like that on a 440C knife, so I think we have to accept that this is a post-80 Four-Dotter in 425M and it has been polished up in a way that removed two of the dots.
Being that it's fully radiused, it would be an 83, 84, 85 vintage.....(I'm not sure precisely where, as in late 85 or early 86, the change to the 86 Marking started exactly).
I do see faint swirls in the steel where the dots should have been......not conclusive, but this detective is now convinced.
The seller is either confused or just engaging in a little creative marketing. Who knows, he may even have polished the knife himself to make up a "NIB" item from one with a few wear marks.
Sellers on e-Bay often buy and sell a lot of knives. Can't expect accurate historical information all the time.
Good eye, Scott Hartman.
Now we will all be on the alert for that faint line across the blade of a "NIB" knife.
