Actually this is (in all probability) a forgery of a "real"
shekel as opposed to what people usually mean by "false" shekels. The so-called "false" shekels, dating from hundreds of years old to quite recent, typically have modern hebrew lettering, and the designs are very different from the silver shekels of the great rebellion. The example discussed here is a reasonable facsimile of an ancient
shekel, with lettering in the ancient
style. (Actually, the lettering
style on the coins was already out of common use by the time of the great rebellion, but that is another story).