"Dewar's blended scotch whiskies endure a double-barrel aging process where newly created blends are placed back into vintage oak casks for a second period of maturation, creating remarkable smoothness, depth of character, and a lingering finish. Typically, the younger the whisky, the lighter in character it will be, whereas the older the whisky, the more robust and full bodied it will become. However, age isn't necessarily a reflection of quality. Never shy away from a young whisky over an old one, you’d be missing out on some fantastic liquid if you did."
What is the aging process with each? Is there a labeling process that reflects the age of the scotch?