Most rock fans know that before joining The Rolling Stones, music legend Sir Mick Jagger studied at the London School of Economics. This is indeed the case: but a lesser-known fact is that he took time out of his studies to travel the world, pausing to record World Music with local musicians under fake names. This is one of these exceedingly rare recordings. The rest have been destroyed by an underground movement of rock purists who wish to hide Jagger’s less than salubrious musical past.

Estimated value: Priceless.