The first 1200 or so of the initial contract with the Army had the Chevron denoting 1987. Phrobis had us stop doing this because they were not supposed to have any mark on them that would give away their maker. Of the 1200, 250 were numbered. The odd numbered ones went to Buck and the even numbered went to Phrobis.
Hope this helps,
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Joe Houser
Director of Quality, Buck Knives Inc.
Buck Collectors club Administrator