A helpful timeline illustrating the packaging of McCormick and Schilling spices over the years is also provided, so you can quickly identify (and toss) the really old stuff.
"1940s: World War II rationing has ended. You can buy some new spices." XD
Be sure to check out the Spice Stories, 35 pages of short testimonials from folks finding old tins of nutmeg and cloves while cleaning the kitchen!