DIN 32755-1
DIN 32755-1 Office machines; inked ribbons; part 1: spool with 30 mm und 35 mm in diameter for ribbons of 13 mm width
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/1994
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/1994