Olympic logos

Scott Hansen of ISO50 has compiled all the Olympic logos from 1924 to now for a side-by-side comparison. It's very interesting to see how they've changed over time. Try and guess which decade the following logos are from (names and dates removed, obviously)...

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Click the link to see if you're right.

It remains to be seen if the much-debated London logo will really be a product of its time too...