Update: after studying these coins further, it's pretty obvious these are repunched dates. I have seen master hubs at the Kongsberg mint in Norway from this period that indicate only the last 2 digits were added to the dies. Doubling elsewhere on the coin happened independently of the date.
I tried looking it up on Krause, it's not listed as a variety? Obviously there are quite a few of them and it seems dramatic enough it should be known variety right?
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