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No, November Bolts are not the only Bolts with an X... A check digit is utilized to assure someone has not forged a Serial Number as PA Bolt EV explained above... certain other numbers in the series are utilized to calculate the said Check Digit...If the remainder is 10 then the check digit is “X." There are a lot of Xs out there.Jackpot:
Now we just need to figure out what this means…