Understanding mint marks on the back of American silver eagles 1986 - present
“Why doesn’t my Eagle have a mint Mark?”
On burnished American silver eagles After 2006, there will be a mint mark on the reverse, W for West Point or S for San Francisco. When listing said coins on eBay, the W or S should NOT be surrounded by parentheses. I.e. 2006-W Silver Eagle
Unburnished coins after 2006 will not have a mint mark And therefore MUST have parentheses around the W or s. this will avoid confusion between those coins with mint marks and without.
Example: 2014-W is a Burnished coin WITH a W on the obverse. 2014(W) is NOT BURNISHED and does NOT have a W on the obverse.
The only way an unburnished coin gets a mint designation on its slab label is if it was delivered to the grader in a sealed box directly from the mint.
The coin will NOT have a mintmark ( W or S ) on it.
Not everyone lists these correctly, so you MUST check the description carefully, and check the website of the grading company to determine its authenticity.
Graded Perfect Silver Coins on GardnerMall/eBay

By the way I was taught, shouldn't this label have a (W) on it???
Like I said, not everyone follows these rules.

*Population Reports and Price Guide Information provided in the listing description are reflective of the current information at the time of the listing's creation or original start time. We encourage you to double-check that information independently as Populations and Price Guides are subject to change.