Nike Mercurial Vapor IX 1998 R9 15th Anniversary Limited Edition - SIZE US 11 | eBay
Collector boots Ronaldo Nike Mercurial R9 ref 117311 size us8 RARE inter milan | eBay
15 years with the Mercurial R9 - The original faces off with the heir
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
Nike Announces Mercurial Vapor IX Special Edition: Inspired By 1998 Mercurial R9, Coming To Malaysia Soon - Lowyat.NET
Mercurial Mk1 - The Original R9 - SoccerBible
15 years with the Mercurial R9 - The original faces off with the heir