Bar Kokhba revolt coinage were coins issued by the Judaean rebel state, headed by Simon Bar Kokhba, during the Bar Kokhba revolt against the Roman Empire of 132–135 CE.
During the revolt, large quantities of coins were issued in silver and copper with rebellious inscriptions, all being overstruck over foreign (mostly Roman) coins, when a file was used to remove the designs of the original coins, such as the portrait of the Roman Emperor. The undercoin can clearly be seen on some of the silver coins because they were not filed down so as not to lose the value of the silver. On the bronze coins it is very difficult to see the underlying coin because they were filed down before they were over-struck. In rare instances, the coin cracked when it was overstruck.