Which brand collaboration holds the Guinness World Record for 'Largest Product Launch' based on simultaneous availability across countries?

The Guinness World Records book itself is one of the most famous branded products in history, having sold over 143 million copies in more than 100 countries since its first publication in 1955. Test your knowledge about the most remarkable brand collaborations that have made their way into the prestigious record books. These partnerships didn't just make headlines—they made history!

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• Apple iPhone 6 and Samsung Galaxy S6 (joint launch in 132 countries)
• Microsoft Xbox One and Sony PlayStation 4 (joint launch in 156 countries)
• Apple iPhone 5 and Samsung Galaxy Note II (joint launch in 114 countries)
• Microsoft Windows 8 and Skype (launched together in 197 countries)

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