dated

Harley-Davidson Facts 　 The inventor of the Harley-Davidson motorcycle, Arthur Davidson, died and went to heaven. At the gates, St. Peter told Arthur, 'Since you've been such a good man and your motorcycles have changed the world, your reward is that you can hang out with anyone you want to...

I know the stock rubber lines are supposed to be stamped with the year of manufacture. Is this true of braided stainless lines? What is the useable life of braided lines, if one assumes that 10 years is the life of the stock rubber lines?