Very nice 1946 Denver Mint Walking Liberty Half Dollar authenticated, certified, and graded MS 64 by NGC (in an old holder). 

Coin Specifications NGC GRADE SUMMARY
Category: Walking Liberty Half Dollars (1916-1947)
Mint: Denver Total Graded: 13237
Mintage: 2,151,000 Low Grade: F
Obverse Designer: Adolph A. Weinman Average Grade: 64
Reverse Designer: Adolph A. Weinman High Grade: 67
Composition: Silver
Fineness: 0.9000
Weight: 12.5000g
ASW: 0.3617oz
Diameter: 30.6mm
Edge: Reeded

Numismatic specification data from Krause Publications NumisMaster.