2003DS/EN 60122-1:2003 Quartz crystal units of assessed quality - Part 1: Generic specification
1985DS/IEC 122-1:1985 Quartz crystal units for frequency control and selection. Part 1: Standard values and test conditions with Amendment No.1 (1983)
DS/IEC 122-1:1985 Quartz crystal units for frequency control and selection. Part 1: Standard values and test conditions with Amendment No.1 (1983) was changed to DS/EN 60122-1:2003 Quartz crystal units of assessed quality - Part 1: Generic specification.