IBM 4.0/10 GB - 4mm Tape Drive

 

  Picture     MicroCode
 (see above)       Lvl.
 ---------------------------------------------
     1           V4BKC-42         3.5-Inch
     2           V5.77-42         3.5-Inch
 ---------------------------------------------
                 V4BKC-47        5.25-Inch
                 V5.77-47        5.25-Inch
 ---------------------------------------------