ISO 646-IRV
From Just Solve the File Format Problem
ISO 646-IRV (646-IRV, ISO IR-2, IR-2) is one of several 7-bit character encodings in the ISO/IEC 646 series. This one is an "Internnational Reference Version" which is the same as ASCII except with a generic currency symbol in place of the dollar sign. A variant version has an overline in place of the tilde.
