Federal supply schedule, FSC groups. 75. Office supplies, pt. 3 (formerly class 54, pt. 3, sec. A), FSC class 7510, Frames and plates for addressing and accounting machines, FSC class 7520, Copyholders, dispensers (gummed tape), stapling machines, line magnifiers, moisteners, and cases, file, transfer, July 1, 1958-June 30, 1959, prepared by National Buying Division.