IMO it won't change the value much if any but I could br wrong. This isn't - to my knowledge - one of the sought after collections released by Case so its value, ultimately, is what someone is willing to pay for it.
A factory screw up to be sure or . . they shipped it with the two blade model not available at the time of packaging.
Just my $0.02!
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Mike Marshall
NRA Life Member
RKS# 5598
RKCC# CM-068