It is worth whatever one troy pound of silver is worth. Since 1 troy pound is 12 troy ounces and since one troy ounce of silver is worth ~$22, your coin is worth $264. However, keep in mind that silver prices fluctuate on a minute by minute basis.
A 1921-S Walking Liberty Half Dollar in very good condition (VG8) is worth: $80.00.
What is the worth of the 2005 Walking Liberty silver uncirculated?
$29.
uncirculated = $17 proof = $55
As of today about $17.00
No such coin
A slabbed 1946 Walking Liberty half dollar has a current average retail value of $138.00 in MS-65
It's a Walking Liberty Half Dollar not a Standing Liberty half dollar and the value is about $6.00
$10.08 to $111
About $6.00 just for the silver
In average condition a 1936 Walking Liberty half dollar is valued at $18.00.
The 1946 walking liberty half is a common date, but because it is 90% silver, it is worth around $10.50 in common circulated condition.