1) Copies 2) Copies of old 3) Duplicates 4) Duplication marks 5) Lazy list marks 6) Marks meaning the same thing 7) Marks of lazy listers 8) Old copies 9) Old-fashioned paper copies 10) Photocopies, back in the day 11) Photocopy ancestors 12) Plays copycat 13) Pre-photocopy copies 14) Repeat marks 15) Repetition savers 1) Repros 
• (pl. ) of Ditto