Yes, it looks very original! Weight: Around 19.09 gr, my scale is showing this; not quite sure. Diameter: 38 mm Magnetic (not very strong) The date is doubled and in (UNITED STATES OF AMERICA); UN and CA are doubled too. And there is a (let say) reflection of 04 from 1804 in reverse. Could it be a variety or fake?
That is an extremely crude fake, I'm afraid. You'd have a better chance at being struck by lightning, attacked by a shark, and being elected president all on the same day than finding an authentic and undocumented 1804 silver dollar. https://coins.ha.com/heritage-aucti...million-at-heritage-auctions.s?releaseId=2404
Funny thing, I actually tested one of these from Vietnam for a friend at work . I used my Metal detector and the results indicated "JUNK" . True story....