Your 1884 Trade Dollar is a copy or fake with little or no value.
There are only 10 known 1884 Trade Dollars and there all Proof coins
i have 1884 trade dollar i got it in a charity shop 20 year ago not proff same weight but not a fake
No mint mark means the coin was minted in Philadelphia.
If it has one, it's on the reverse above DO in the word dollar.
It means it was made at the San Francisco mint.
A 1884 Trade Dollar was only minted in proof condition by the US Treasury and carried NO mint mark. If you happen to possess this coin, its value is: $125,000!
Circulated coins are valued at $17.00-$26.00, the 1884-O Morgan is common.
It would be on the back, beneath the eagle's tail feathers.
$24 to $500,000 depending upon the mint mark and the condition of the coin.
A 1884 Silver Dollar - aka - Morgan Dollar - is worth in good condition (G4): $18; if its mint state is MS60, the value rises to: $40.
An "S" mintmark just means that the coin was made in the San Fransisco Mint.
The 1884 Morgan dollar is common, circulated coins have retail values of $17.00-$26.00. Mint State coins are in the $30.00-$50.00 range.
$24 to $500,000 depending upon the mint mark and the condition of the coin.