John, saw that coin when it was previously listed. My impression of the piece was that it was just kind of a sloppy casting. If you get past the muddled transitions between relief and fields, the design elements look quite correct for an 1804 (and surrounding) Lima 2R... even down to the inward-sloping date digits.
Also, I would offer that "assayer J" is actually just the correct-for-the-date assayer JP with the "P" just lost in a non-impressed and/or worn area. Fairly sure I see a weak impression of what should be the dot after J (though not really any trace of the "P" after that).
The 1822 Durango 8R is an interesting piece. The obverse is fairly accurate... but then the reverse went all wrong!
Also, I would offer that "assayer J" is actually just the correct-for-the-date assayer JP with the "P" just lost in a non-impressed and/or worn area. Fairly sure I see a weak impression of what should be the dot after J (though not really any trace of the "P" after that).
The 1822 Durango 8R is an interesting piece. The obverse is fairly accurate... but then the reverse went all wrong!



















