Oki Microline ML380 Handbook page 8

Note:Use only ribbons specifically made for MICROLINE 380, 390, or 391 printers. The use of
ribbon not designed for the MICROLINE 380/380/391 printers could damage the printhead.
Please also note that while ribbon cartridges for other MICROLINE printers look similar, they will
either not fit the ML380 or they will give poor print quality because the ribbon and ink don't meet
the requirements of 24-pin printers.
For best results, use genuine OKIDATA ribbons, part number 52104001.
ML 380 ( 96-02-03 )