Silver:)-cm
Strictly speaking U.S. coin silver is 900 fine (90%), so 800 fine doesn't fit the category. However other countries have made coins from 800 fine silver so in a more general sense it is coinage...
The O is the mint mark, it stands for the New Orleans mint.
Denver, Colorado, the location of the mint at which it was produced.
It means to be kind and helpful and to love one another