Just looks like Die Deterioration on MONTICELLO to me (and no, die cracks cannot cause doubling) https://www.error-ref.com/?s=die+deterioration Die cracks, while they can be interesting, don't typically add anything to most coins. That said - the die crack on the reverse could be of interest. I'll let others with much more expertise than me comment further on that
Get some nice clean, clear closeup pics of the crack at the base of the bust and nice, clear cropped pics of the obverse and reverse and send to COC ( Cuds on Coins) for a new spike head listing for this year/mint of a Jefferson nickel, this one is not listed.
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