NEC FD1231M Black 3.5\" 1.44MB floppy drive for use in any standard desktop computer FD1231M. P/N 134-506790-603-4 NEC FD1231M Black 3.5\" 1.44MB floppy drive for use in any standard desktop computer. NEC FD1231M. P/N 134-506790-603-4 Black 3.5\" 1.44MB floppy drive for use in any standard desktop computer. NEC FD1231M. P/N 134-506790-603-4