NoWammiesSTOP!, it's about 1troy ounce when you combine the face value of junk silver to $1.40~ In another word, every $1.40 pre-64 constitutional silver equals to .999 pure 1 troy ounce! $1.3822222 face value is equal to 1 troy ounce, but since most of the junk silver are worn, so we should consider $1.40 = 1 tOz