Two CDs. March 2024 marked the 50th anniversary of the release of the T. Rex album "Zinc Alloy & The Hidden Riders Of Tomorrow". Recorded in Munich and co-produced by Tony Visconti and Marc Bolan, it was the first album to feature Gloria Jones on vocals and marked Bolan's growing interest in US music styles. The album included "Teenage Dream" and was accompanied by the hit singles "The Groover" and "Truck On (Tyke)", which have been added to CD1, along with their three B-sides. In this special 2CD set, CD2 contains "The Alternate Zinc Alloy: Change", a bonus disc of 24 fascinating 'work-in-progress' versions and demos, which (as far as possible) mirrors the original album's running order. The two CDs are presented in brand new seven-inch deluxe gatefold packaging, with an 8-page booklet which includes the lyrics, plus annotation about the bonus disc.