The Full 25 Year History of the Nike Mercurial - Footy Headlines
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Nike Mercurial Vapor Match FG R9 Ronaldo Black Blue Football Soccer Cleats US9.5 | eBay
I believe these are the mercurial r9 from 1998. I remember having a pair with the same colorway but without cleats. For indoor soccer I believe but can't find any info online.
Nike Mercurial World Cup football boots from 1998 to 2010