grandpadavid the number you are referring to is the Ka-Bar Collector's member #, not sure how the member #'s where done but many of the knives I show have #418 as this was my cousin's Collector # not sure how many members there were but believe at height of the club over 25,000 hope this helps. As a side note will get back to this thread but was not happy with the inside photo's so just need a little more time to get the thread finished Thanks for being Patient
KEEP EM SHARP