I put an X in parentheses in place of the last digit because I was advised not to post full serial numbers online. lol ...I don't know, maybe I am being paranoid.  But the last digit is not an x. 
Parashooter wrote on Feb 17^th, 2017 at 5:52am:

realaleman wrote on Feb 17th, 2017 at 1:26am: . . .The serial number is 2468(X).  The serial appears to be either erroneous or fraudulent. All U.S. Krag serials consisted of numerals only, with no punctuation marks or letters.