Nike Mercurial Vapor IX SE FG MVXV (Ronaldo R9 1998) - Unboxing + On Feet - YouTube
NIKE Tiempo MV VAPOR I II III R9 INDOOR TRAINERS SOCCER BOOTS 12 12 46 | eBay
Nike Mercurial Superfly IV Heritage iD FG Ronaldo R9 1998 World Cup US 11.5 | eBay
Nike Mercurial Vapor Chrome World Cup 2002 Soccer R9 Football Indoor Ronaldo 02 for Sale in Chicago, IL - OfferUp
Nike Mercurial Vapor I Talaria IC Indoor R9 Ronaldo Silver Red 9.5 US Elite | eBay
Nike Mercurial Superfly 9 Club Indoor/Court High-Top Soccer Shoes. Nike.com
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 Football Project CNCPT Mercurial “Just Do It” Design Sneakers 8 Blk Silver | eBay
Nike celebrate 15 years of Mercurial and recreate the R9 boot