This is a bit deceiving; in the case of the 'Drover', Charlie also added a large number of sfos in ebony in this pattern; also, it was a new pattern (we were lucky to get) upon which a later run was produced on the same frame. As to the OKCA knives, there were 50 serialized and another 50 non serialized, and again they were produced along with a factory run with only the covers/shield/etch and box label different. The 500 number is what GEC would require for a genuine sfo on a unique frame, and actually, I think he needs at least a thousand on a pattern to make a run feasible.
I don't know how Buck works, but I assume it would just be a standard frame/pattern with different covers and possibly a premium blade steel. Personally, make mine a 112 barehead with S30V drop point blade and elk covers with a carved likeness of Spark on the mark side.



OK, maybe a feather or something....