The US silver dollar was redesigned midway through 1921 employing the new Peace theme designed by medalist Anthony DeFrancisci.  Employing a fresh "art deco" design, Lady Liberty is facing left on the obverse with the date underneath.  The reverse has a perched eagle holding an olive branch perched atop a rock with "peace" inscribed, to commemorate the end of WWI. 

Like their Morgan predecessors, these coins contain .77345 ounces of pure silver, and most survivors today have been heavily circulated.  Mint condition examples offer a great opportunity in the market today in our opinion, receiving added value from their high grade, age, and silver content.