The mintmark if it has one is in the same place on all Morgan silver dollars, it's on the reverse just above the letters DO in dollar. If it does not have a mintmark it was coined in Philadelphia no Morgan dollar has a "P" mintmark. The only mintmarks used on Morgans are O, S, CC and a D was used in 1921 only.
Values for circulated coins are $17.00-$26.00 1885 is a very common date.
The 1885-O Morgan dollar is common, in general values are $32.00-$38.00 depending on grade.
The mint mark on all Morgan Dollars is located on the reverse side of the coin just above the letters "DO" in the word "DOLLAR".
All circulation-strike 1885 silver dollars are Morgan dollars. "Morgan" refers to the sculptor George T. Morgan who designed the coin."Plain" refers to a coin without a mint mark. Up till 1979 Philadelphia did not put a P mint mark on any $1 coins (and on almost all other coins minted there as well). So, an 1885 Morgan dollar minted in Philadelphia is considered to be "plain". Please see the Related Question for more information.To be annoyingly correct, the US also minted "trade dollars" in 1885, but these were intended for use outside of the country. 1885 was the last year trade dollars were minted and all were special proof coins.
Retail for 1885 in MS-65 is $200.00
The 1885-O Morgan dollar is a common New Orleans Mint coin. Mint State coins in the MS-60 to MS-63 range are $35.00 to $55.00 retail.
Money can have various values based on condition and certain stamping. An 1885 Morgan Liberty Head silver dollar can be worth between $20 and $400.
above the DO in the dollar
No such thing as a "strike mark" but U.S. coins do have Mintmarks. For Morgan dollars, they are on the reverse just above the DO in DOLLAR.
The mint mark on any Morgan dollar is located on the reverse (tails) side, near the bottom, just above the letters "do" in the word "dollar."
The mint mark on any Morgan dollar is on the reverse above the letters DO in dollar.
Assuming it's circulated and has no mintmark. The 1885 Morgan dollar is a very common Philadelphia Mint issue coin. Value is $33.00 to $39.00 depending on condition.