This is just a quick answer, but a few of the notable security features of a bill are...
micro printing
metal strip
watermark
colored ink (like the shiny things on the new 20)
For a more detailed explanation, see http://www.moneyfactory.gov/newmoney/main.cfm/currency/new5
It is a counterfeit.
It would be pretty difficult to have an 1825 silver dollar because the U.S. didn't mint that denomination for circulation between 1804 and 1835 inclusive. Please check your coin again and post a new question. If it really says "one dollar" on the back it's counterfeit.
If you have a Seated Liberty dollar dated 1875, then you have a counterfeit -- the last year for them was 1873
If you have a U.S. silver dollar dated 1790, then you have a counterfeit. The mint did not start making silver dollars until 1794
There were no ten dollar bills issued in the year 1935. If one is presented with one, it will be counterfeit and therefore has little to no value at all.
Mainly to make it difficult to produce phony, bogus, counterfeit one-dollar bills.
Japan
A silver dollar from the year 1020 is worthless, as it is a counterfeit.
An 1847 seated silver dollar = =
It is a counterfeit.
Counterfeit Pens will only work on bills that were made after 1959.
It makes the bills harder to counterfeit.
A couple of years in a Federal penitentiary.
It would be pretty difficult to have an 1825 silver dollar because the U.S. didn't mint that denomination for circulation between 1804 and 1835 inclusive. Please check your coin again and post a new question. If it really says "one dollar" on the back it's counterfeit.
they are difficult to counterfeit
Counterfeit pens are unreliable and do not work on currency printed before 1959.
If you have a Seated Liberty dollar dated 1875, then you have a counterfeit -- the last year for them was 1873