Mint mark: If none can be found it is (Philadelphia Mint), but many have the mint marks D (Denver Mint - 1921 only), S (San fransisco Mint), O (New Orleans Mint).
Note: This George T. Morgan creation has become America's most collected, famous, and abundant silver dollar. Coupled with the coin's size, silver content, beautiful design and high mintages it's no wonder it's coin collectors most favorite coin.
Mintage: 11,550,000 Proofs: 0
Look for the 1887/6-O variety, referred to as VAM3. It has an estimated mintage of 200,000.