Most Jaguar guitars come equipped with split post vintage tuning machines (also referred to as Waffleback, Kluson, and Butter Bean). They can be identified by the two screw per tuner mounting pattern each tuner shares a screw with its neighbor) and the press in bushing on the front (as opposed to a nut)
Our Vintage Tuner Upgrade Kit for 6 Inline Headstocks is a direct fit for these guitars with no modifications needed!