Hebrew coin minted by rebels as part of underground Jewish economy and used to pay tax at Temple in Jerusalem is discovered during six-year survey mapping area of Dead Sea Scrolls

Quarter-shekel minted in 69CE was smuggled out of country to black market; international probe results in it finally being restored to Israel Antiquities Authority

Experts suggest coin may have been made by priests assisting Great Revolt against Romans, using precious metal from holy site's plentiful reserves