The campaign in France, the Netherlands, Spain, Greece, Hong Kong, Italy, Portugal, the US and the UK advertises Swatch Jelly, a new line of jelly-style watches, which are a revamp of the classic plastic Swatch watch and comes in five colours.
Michael Pennington, international account director at Metro International, said: "Metro International is a global brand with global reach.
"This is the first big brand campaign to have run across major American, European and Asian cities, where all editions are running the same thing and at the same time."
Swatch-branded street teams will also be distributing the paper direct, as well in the Metro bins on streets and at stations.
Metro International's global ad sales team, based in London, worked with the team at Associated Newspapers to deliver the promotion, which includes a "splash effect" cut-out ad inside the paper.
Metro's ad sales have increased 44% since the first edition in 1995. The freesheet now has 69 editions in 19 languages, and is distributed in 93 cities and 21 countries across the world.
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