20 Walking Liberty Half Dollars, all from 1942 and 1943. Together these add up to 7.24 Troy Ounces (Actual Silver Weight), which at the December 3 spot value over $59/ounce equals about $427 of silver. Yours for only $410, about 4% under spot value.
While I am not a professional coin grader, I would guess that these would be considered Good or better. It's hard to believe that these are now over 80 years old. They would make a nice holiday gift for a collector or silver stacker.