2011-(W) $1 Silver Eagle Struck at West Point First Strike MS70 认证号20112318, PCGS号508072

This designation puts this coin in the first 25000 Eagles Released (of that first 25000 only a limited number of the most perfect coins rated MS70), making it one of the First of the First Strikes issued With this early designation, this Eagle was struck while the mint dies were new, yielding the crispest image you can find in a MS70 Eagle

Jaime Hernandez

 2011-W Silver Eagles came in the special 25th Anniversary Silver Eagle Set. These coins were struck at the West Point Mint, however, they do not have the W mint mark.

This is why PCGS has described them as (W) rather than just W as the mint mark.