A Model 5 comes with thumb notches as standard.(although I have a couple older ones without them). IF you order a double hilt, (making the knife like a fighter) the thumb notches deleted? Makes sense, as you can't use thumb notches with a double hilt.
I never noticed that before.
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Rod Brown RKS 3846 RKCC CM-123 Whether you think you can or can not, you are right.