Chanel No. 5 has been on sale continuously since 1921. It's estimated that a bottle is sold every 55 seconds.
I find it interesting that this scent's popularity persists nearly 100 years later. You can buy a bottle of it today and smell the same as someone who wore it 90 years ago. Instead of being retired as a "grandma perfume" long ago, it still continues to find a receptive audience; seemingly timeless.
"What do I wear in bed? Why, Chanel No. 5, of course." - Marilyn Monroe