1981-07-13 /BB-H506D-SM_1983/01/cobol/build/pure.rel 1981-07-13 /BB-H506D-SM_1983/01/conversion/utility/pure.rel 1984-02-22 /BB-Z759A-SM/01/cobol-build/pure.rel 1985-10-04 /BB-H506E-SM/01/cobol/build/pure.rel 1985-10-07 /BB-H506E-SM/01/conversion/utility/pure.rel