I wanted to share the following images that I have in the 'Kate vaults'. Perhaps the idea is old, but it's good to curate a few in one place.
It's interesting to see the progression of the brands from a 'visual identity' perspective. I believe the strongest brands witness minimal change over time – timelessness is an important factor for logo design. Coca-Cola is a great example of this as it has hardly changed since inception. On the other hand, Pepsi's ongoing changes do carry the 'spirit' of an age but inconsistency is not a good thing when it comes to branding when you are looking for awareness and recall.
I'm now trying to think of my favourite brand's logo – what's yours? *Off to check out Interbrand's 2008 list*