For this year the mintmarks can only be "S" "O" and "CC" or no mintmarks. No Morgan dollar will have a "P" mintmark like modern coins.
An 1847 seated silver dollar = =
Like an eagle
1879 would make it a "Morgan" dollar.
That depends on what silver dollar you're talking about. See the related links below for pictures of different US silver dollars.
1836 U.S. Silver Dollar type this into your search box and click on images to see one.
It looks the same as any other Peace dollar.
Click on the link in "RELATED LINKS" to see the 1796 silver dollar.
1879 would make it a Morgan dollar, which has an eagle on the reverse.
In the search box on your home page, type in 1891 silver dollar then click on images, this will bring up a lot of pictures.
There's no such thing. The U.S. didn't mint any silver dollars that year.
The Eisenhower's that have 40% silver in them dated 1971 all have an "S" Mintmark and were never released for circulation.
The 1891 Morgan Silver Dollar can be seen by using the link to a picture of this coin.