Frodo,
The original run of those daggers was for Providence mint. They ordered 2000 of them. They actually only ended up with about 1200 though and the remainder were used for other projects. That is why, as BuckCustom pointed out, some are serialized and some are not. There is a run of 250 made for Sharper Image in 1986 and they are serialized "1 of 250".
Hope this helps,
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Joe Houser
Director of Quality, Buck Knives Inc.
Buck Collectors club Administrator