Designated as an "Early Release" this coin is a popular bullion coin, favored by both investors and collectors. 
Here's what makes it special:
Composition:
It contains one troy ounce of .999 fine silver, with a face value of $1. 
Design:
The obverse features the iconic "Walking Liberty" design, originally used on the half dollar from 1916 to 1947, while the reverse shows a heraldic eagle. 
Grading:
The MS 69 grade indicates the coin is in nearly perfect condition, with only minor imperfections visible under magnification. 
Early Release:
This designation means the coin was among the first struck and released by the mint. 
Investment:
American Silver Eagles are a popular choice for silver investments, and can be used to fund Individual Retirement 
Accounts. 
Key features of the 2013 American Silver Eagle include: 
A diameter of 40.6 mm.
13 stars representing the original US colonies.
The motto "E Pluribus Unum" meaning "Out of many, one".
The coin in the image is encapsulated in a protective plastic holder by NGC, which helps preserve its condition and confirms its authenticity.