W-E-661B, FEDERAL SPECIFICATION: ERASER, ELECTRIC (15 JAN 1969) [USE W-E-00661B IN LIEU OF W-E-661] [NO S/S DOCUMENT]

W-E-661B, FEDERAL SPECIFICATION: ERASER, ELECTRIC (15 JAN 1969) [USE W-E-00661B IN LIEU OF W-E-661] [NO S/S DOCUMENT]., This specification covers electric erasers designed to erase pencil and ink markings from paper and cloth surfaces.