This part of ISO 2768 is intended to simplify drawing indica-tions and it specifies general tolerances for linear and angular dimensions without individual tolerance indications in four tol-erance classes.
EN 22768-1:1993 history
1993EN 22768-1:1993 General tolerances; part 1: tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1989)