Quantum Jump / Van McCoy : The Lone Ranger
Italy, 1976 - 7" CS - Ariston JB 042 - Promo white labels, shared with other artist Van McCoy - The Lone Ranger (2:51) on A-side

Quantum Jump : The Lone Ranger / Drift
UK, 1976 - 7" CS - Electric WATT 2 - demo copy - push-out center

Quantum Jump : The Lone Ranger / The Lone Ranger
Italy, 1976 - 7" CS - Ariston AR 00746 - promo yellow vinyl - The Lone Ranger (2:51) on both sides

Quantum Jump : The Lone Ranger / The Lone Ranger
Italy, 1976 - 7" CS - Ariston AR 00746 - promo orange vinyl - The Lone Ranger (2:51) on both sides

Quantum Jump : The Quantum Jump Maxi Single
UK, 1976 - 7" EP - Electric WOT 9 - demo copy - push-out center - no 'A side' mention

Quantum Jump : Quantum Jump
UK, 1976 - LP - Electric TRIX 1 - white labels test pressing

Quantum Jump : The Lone Ranger / The Seance (Too Spooky)
UK, 1979 - 7" CS - Electric WOT 33 - demo copy - plain labels

Quantum Jump : Mixing
UK, 1979 - LP - Electric TRIX 11 - white labels test pressing

Quantum Jump : Quantum Jump
UK, 1999 - CD - VoicePrint MPVP 012CD - incl. 5 bonus tracks - Serendipity test pressing